With A Specific Feedback Amplifier (e.g., Integrator, Summer) Patents (Class 323/280)
  • Patent number: 11107525
    Abstract: A voltage regulator and a phase change memory are disclosed. In an embodiment a phase-change memory includes an array of a plurality of phase-change memory cells, an address decoder configured for receiving an address signal and selecting a sub-area in the array of the plurality of memory cells, the selected sub-area having a given number of bits of a data signal and a writing circuit including a control circuit configured for receiving the data signal and determining, for each memory cell in the selected sub-area, whether a respective bit of the data signal indicates that the memory cell is to be changed from the amorphous state to the polycrystalline state and one or more driving circuits supplied via a regulated voltage and configured for applying the set current for the first interval to the memory cells that are to be changed from the amorphous state to the polycrystalline state.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: August 31, 2021
    Assignee: STMicroelectronics S.r.l.
    Inventors: Michele La Placa, Fabio Enrico Carlo Disegni, Federico Goller
  • Patent number: 11086343
    Abstract: A method of regulating a low-dropout (LDO) regulator is provided. The method includes: generating a feedback voltage by receiving a feedback from an output node of the LDO regulator, generating a control signal to drive a pass element by receiving the feedback voltage and a reference voltage, detecting a voltage at a first node and controlling a switching operation of a first switch according to a detection result by a detection circuit. When the LDO regulator is operating in an active mode, the first switch is turned on to connect the first node and a control terminal of the pass element and when the LDO regulator is operating in a standby mode, the first switch is turned off to disconnect the first node from the control terminal of the pass element. A low-dropout (LDO) regulator is also provided.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: August 10, 2021
    Assignee: Winbond Electronics Corp.
    Inventor: Jungung Kim
  • Patent number: 11079782
    Abstract: In described examples of a circuit that operates as a low-power ideal diode, and an IC chip that contains the ideal diode circuit, the circuit includes: a first P-channel transistor connected to receive an input voltage on a first terminal and to provide an output voltage on a second terminal; a first amplifier connected to receive the input voltage and the output voltage and to provide a first signal that dynamically biases a gate of the first P-channel transistor as a function of the voltage across the first P-channel transistor; and a second amplifier connected to receive the input voltage and the output voltage and to provide a second signal that acts to turn off the gate of the first P-channel transistor responsive to the input voltage being less than the output voltage.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: August 3, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Timothy Bryan Merkin, Hassan Pooya Forghani-Zadeh
  • Patent number: 11079783
    Abstract: A power supply circuit according to the present invention includes, for example, an output circuit arranged to generate a stabilized voltage from an input voltage using an output transistor, a filter circuit arranged to smooth the stabilized voltage using a resistor and a capacitor so as to generate an output voltage, and a charging circuit arranged to supply charging current to the capacitor without the charging current being passed through the resistor.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: August 3, 2021
    Assignee: Rohm Co., Ltd.
    Inventor: Hiroki Inoue
  • Patent number: 11073422
    Abstract: A light detection circuit for a projector is provided. The light detection circuit includes: a light transistor for receiving and sensing reflected light from a side of a color wheel driving motor of the projector, wherein the side of the color wheel driving motor includes a dark region and a bright region; a bias unit coupled to the light transistor for providing a bias voltage; an operation amplifier including a positive input coupled to the bias unit, a negative input coupled to the light transistor and the bias unit, and an output, the base unit providing the bias voltage to the positive input; and a feedback resistor coupled between the negative input of the operation amplifier and the output, wherein, a resistance of the feedback resistor causes the light transistor to be operated in a linear region.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: July 27, 2021
    Assignees: BenQ Intelligent Technology (Shanghai) Co., Ltd., BENQ CORPORATION
    Inventor: Shih-Pin Chen
  • Patent number: 11068006
    Abstract: Described are apparatuses and methods for power management. The apparatus may include a power gate including a plurality of current sources. The power gate may be coupled to a load. The apparatus may further include a voltage control circuit, coupled to the power gate, to determine and select one or more current sources of the plurality of current sources to supply to the load. The apparatus may further include a current control circuit, coupled to the voltage control circuit, to control individual current sources of the one or more current sources to output a constant current. Other embodiments may be described and/or claimed.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: July 20, 2021
    Assignee: Intel Corporation
    Inventors: Rupak Ghayal, Pradipta Patra, Ramnarayanan Muthukaruppan, Raghu Chepuri
  • Patent number: 11029716
    Abstract: In one embodiment, an apparatus includes: an amplifier to compare a reference voltage to a feedback voltage and to output a comparison signal based on the comparison; a loop circuit coupled to the amplifier, where the loop circuit is to receive the comparison signal and provide a regulated voltage to the amplifier as the feedback voltage in a first mode of operation, and in a second mode of operation to provide a predetermined feedback ratio point to the amplifier as the feedback voltage; and an output device coupled to the amplifier. The output device may be configured to receive a supply voltage and the comparison signal and output the regulated voltage at an output node based at least in part on the comparison signal.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: June 8, 2021
    Assignee: Silicon Laboratories Inc.
    Inventors: Hua Beng Chan, Rex Tak Ying Wong, Ricky Setiawan
  • Patent number: 11016519
    Abstract: A voltage regulator includes an error amplifier producing an error voltage from a reference voltage and a feedback voltage. A voltage-to-current converter converts the error voltage to an output current, and a feedback resistance generates the feedback voltage from the output current. The error amplifier includes a differential pair of transistors receiving the feedback voltage and the reference voltage, a first pair of transistors operating in saturation and coupled to the differential pair of transistors at an output node and a bias node, a second pair of transistors operating in a linear region and coupled to the first pair of transistors at a pair of intermediate nodes. A compensation capacitor is coupled to one of the pair of intermediate nodes so as to compensate the error amplifier for a parasitic capacitance. An output at the output node is a function of a difference between the reference voltage and feedback voltage.
    Type: Grant
    Filed: November 25, 2019
    Date of Patent: May 25, 2021
    Assignee: STMicroelectronics International N.V.
    Inventors: Ankit Gupta, Nitin Gupta, Prashutosh Gupta
  • Patent number: 11009901
    Abstract: Certain aspects of the present disclosure generally relate a regulator. For example, the regulator may include a control stage, a sense capacitor having first and second terminals, the first terminal coupled to an output of the voltage regulator, and a current amplifier having an input coupled to the second terminal of the sense capacitor and an output coupled to the control stage. The control stage of the regulator may adjust the output voltage of the regulator based at least in part on a current generated by the current amplifier.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: May 18, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Chi Fan Yung, Hua Guan, Ngai Yeung Ho, Kan Li
  • Patent number: 11009900
    Abstract: Low dropout regulators (LDOs) are disclosed herein. An example of an LDO includes an error amplifier having a first input and a second input, wherein the first input is for coupling to an output of the LDO and the second input for coupling to a reference voltage. The error amplifier has an output with a voltage that is proportional to the difference between the output voltage and the reference voltage. A second amplifier is coupled between the error amplifier and the output of the LDO. A gain boost amplifier is coupled between the error amplifier and the second amplifier. The gain boost amplifier increases DC gain of the LDO in response to a load step on the output.
    Type: Grant
    Filed: January 7, 2017
    Date of Patent: May 18, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Vadim Valerievich Ivanov, Sahana Sriraj
  • Patent number: 10984839
    Abstract: A voltage regulation circuit includes a first comparison and control unit and a second comparison and control unit. The first comparison and control unit is connected to a first switch unit, determine a first bias voltage based on a first output voltage, a first reference voltage, and a second reference voltage, and control a value of an equivalent resistance of the first switch unit using the first bias voltage. The second comparison and control unit is connected to a third switch unit and the second switch unit, determine a second bias voltage based on the first output voltage, a second output voltage, and a third reference voltage, and control values of equivalent resistances of the third switch unit and the second switch unit using the second bias voltage.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: April 20, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Yangyang Tang, Enyi Yao, Chen-Xiong Zhang
  • Patent number: 10958150
    Abstract: An electronic circuit includes a switched-mode power supply and a linear voltage regulation circuit having an input stage, a first output stage, and a second output stage. A first load is capable of being powered either by the switched-mode power supply in series with the regulation circuit or by the regulation circuit without the switched-mode power supply.
    Type: Grant
    Filed: May 16, 2019
    Date of Patent: March 23, 2021
    Assignees: STMICROELECTRONICS S.R.L., STMICROELECTRONICS (ROUSSET) SAS
    Inventors: Michel Cuenca, Bruno Gailhard, Daniele Mangano
  • Patent number: 10958160
    Abstract: A power converter and method are presented. The power converter may have a pass device, a replica device, a feedback circuit, and a regulation circuit. The pass device may be coupled on a first electrical path between an input terminal of the power converter and an output terminal of the power converter. The replica device may be coupled on a second electrical path between the input terminal and the output terminal, wherein a coupling node is arranged on the second electrical path between the replica device and the output terminal. The feedback circuit may generate, based on a reference voltage and an output voltage at the output terminal, a control signal for controlling both the pass device and the replica device. The regulation circuit may reduce a voltage difference between a coupling voltage at the coupling node and the output voltage at the output terminal of the power converter.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: March 23, 2021
    Assignee: Diaiog Semiconductor (UK) Limited
    Inventor: Mityu Mitev
  • Patent number: 10921836
    Abstract: Voltage regulators with fast transient response are provided herein. According to one aspect, a voltage regulator for accepting an input voltage (VREF) and producing an output voltage (VOUT) includes an operational amplifier having as a first input (VREF) and having as a second input a feedback voltage (VFB); an output amplifier having an input coupled to the output of the operational amplifier and an output that produces VOUT, the output being coupled to a feedback path that produces VFB; a compensation capacitor (Cc) connected between the output of the output amplifier and an input to a buffer amplifier that supplies a voltage to the input of the output amplifier. The buffer amplifier has a transconductance (gmBUF) that is controlled to be proportional to a load current (ILOAD), thereby causing the left hand plane zero of the buffer amplifier to cancel the pole created by the output amplifier.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: February 16, 2021
    Assignee: Qorvo US, Inc.
    Inventor: Gaurav Singh
  • Patent number: 10923898
    Abstract: An overvoltage protection circuit is for a power supply including a power converter, the overvoltage protection circuit having a comparator. The overvoltage protection circuit uses the comparator for comparing the power supply voltage with the reference voltage, and for producing a power supply shutdown signal on the shutdown output terminal when the power supply voltage exceeds the maximal power supply voltage, and for latching said power supply shutdown signal on the shutdown output terminal even if the power supply voltage subsequently drops to a level below the maximal power supply voltage. The overvoltage protection circuit has a reset circuit coupled to the first input of the comparator. The reset circuit is configured for pulling the signal level on the first input below said reference value such that the power supply shutdown signal is reset when a reset signal is given to the reset circuit.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: February 16, 2021
    Assignee: Comrod AS
    Inventors: Jarle Frosterød, Tor Vang Pedersen
  • Patent number: 10915133
    Abstract: A voltage regulator circuit is presented that can generate a stable and well-regulated output level to supply loads that have large dynamic current and capacitive variation. A compensation circuit is added to introduce a zero that tracks the voltage regulator's non-dominant pole. The compensation circuit includes a compensation transistor, whose gate is connected to receive the same voltage as the regulator's load driving pass transistor, and a series combination of a capacitance and a tracking resistance connected in series between the compensation transistor's gate and a supply level, where the value of the tracking resistance depends on the current supplied to the load. The tracking resistance can be implemented as a diode connected NMOS through which the compensation transistor is connected to the low supply level, or a diode connected PMOS whose current tracks that of the compensation transistor through a current mirror.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: February 9, 2021
    Assignee: SanDisk Technologies LLC
    Inventors: Xiaofeng Zhang, Naresh Battula, Albert I-Ming Chang
  • Patent number: 10915126
    Abstract: A voltage regulator includes an output voltage terminal which supplies an output voltage having a preset value, a voltage adjustment terminal which detects the output voltage, an error amplifier which compares the output voltage and a reference voltage to control the output voltage, a phase compensation capacitor, a test circuit which switches a normal mode with a test mode to test the phase compensation capacitor, a switch which makes the phase compensation capacitor valid or invalid, and a constant current source which makes a bias current of the error amplifier in the test mode lower than that in the normal mode.
    Type: Grant
    Filed: August 27, 2019
    Date of Patent: February 9, 2021
    Assignee: ABLIC INC.
    Inventors: Kaoru Sakaguchi, Yasuhiko Ogura, Munetaka Yoshimura, Hiroki Takahashi
  • Patent number: 10915124
    Abstract: A voltage regulator includes an output transistor, a voltage division circuit, an error amplifier, a phase compensation circuit connected between the output terminal and the output terminal of the voltage division circuit, and an auxiliary transistor having a source connected to the input terminal, a drain connected to the phase compensation circuit, and a gate connected to the output terminal of the error amplifier through an offset voltage source.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: February 9, 2021
    Assignee: ABLIC INC.
    Inventor: Noriyuki Harada
  • Patent number: 10908626
    Abstract: A linear power supply circuit, includes: output transistor between input terminal where input voltage is applied and output terminal where output voltage is applied; a driver driving the output transistor based on difference between voltage based on the output voltage and reference voltage; and phase compensation circuit, wherein the driver includes differential amplifier outputting voltage corresponding to the difference between the voltage based on the output voltage and the reference voltage, a first capacitance having one end where output of the differential amplifier is applied and the other end where ground potential is applied, a converter converting the voltage based on the output of the differential amplifier into current, and a current amplifier amplifying the current output from the converter, and wherein the phase compensation circuit lowers gain of transfer function of the linear power supply circuit and output capacitor connected to the output terminal.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: February 2, 2021
    Assignee: Rohm Co., Ltd.
    Inventors: Takeshi Nagata, Isao Takobe, Yuhei Yamaguchi
  • Patent number: 10860043
    Abstract: A circuit and a method for supplying a regulated voltage to a target circuit characterized by fast changes in current loading are described. A voltage regulator supplies the regulated voltage to an output node. The voltage regulator has a transistor having a gate, a first terminal connected to a power supply terminal, and a second terminal connected to the output node of the voltage regulator. A voltage transition generator is capacitively coupled to the gate of the transistor to increase or decrease its driving power upon occurrence of an event in the target circuit indicating a change in current loading. The change in current loading can have an expected magnitude, and the voltage transition can have a magnitude that is a function of an expected magnitude of the increase or decrease in current loading.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: December 8, 2020
    Assignee: MACRONIX INTERNATIONAL CO., LTD.
    Inventors: Chun-Hsiung Hung, Shang-Chi Yang
  • Patent number: 10840803
    Abstract: A voltage regulator utilizes a non-invasive sensing capacitor in differentially sensing a current indicative of current of an output capacitor of the voltage regulator. Some embodiments utilize current mirrors and an inverter for determining if the current indicative of current of the output capacitor is above or below a particular magnitude. Some embodiments utilize information indicative of output capacitor current in determining duty cycle for a switching voltage regulator, and some embodiments utilize the information in activating transient control circuitry.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: November 17, 2020
    Assignee: Chaoyang Semiconductor Jiangyian Technology Co., Ltd.
    Inventors: Arnaud Toni, Mykhaylo Teplechuk
  • Patent number: 10831221
    Abstract: A low drop-out (LDO) voltage regulator employs combined compensation methods for reduced capacitor area. Frequency compensation internal to a LDO voltage regulator is accomplished by introducing a metal-insulator-metal (MIM) compensation capacitor in series with a compensation resistor between an input to a second stage of the LDO voltage regulator and a regulator output. This achieves a good settling response over a wide range of load conditions at the expense of relatively large capacitor area. Alternatively, a metal-oxide semiconductor (MOS) compensation capacitor may be coupled between an intermediate node of a cascode circuit in a first stage of the LDO voltage regulator and the regulator output. This requires less capacitor area but exhibits instability at some corners. In combination, a good settling response over all corners may be achieved with stacked MIM/MOS capacitors occupying significantly less area than the MIM capacitor of the first method alone.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: November 10, 2020
    Assignee: Qorvo US, Inc.
    Inventor: Bruce John Tesch
  • Patent number: 10826288
    Abstract: A power circuit including a switching circuit and a soft start control circuit is provided. A first terminal of the switching circuit is configured to receive an input voltage. A control terminal of the switching circuit receives a control signal. A second terminal of the switching circuit is configured to provide an output voltage. The soft start control circuit generates the control signal according to the output voltage and a first reference voltage to control a turn-on state of the switching circuit. The soft start control circuit switches a slope of the control signal from a first slope to a second slope after the switching circuit is turned on and when a voltage value of the control signal is equal to a second reference voltage, wherein the first slope is less than the second slope to reduce an inrush current at the time when the switching circuit is turned on.
    Type: Grant
    Filed: September 8, 2019
    Date of Patent: November 3, 2020
    Assignee: Excelliance MOS Corporation
    Inventors: Ming-Hung Chien, Ching-Tsan Lee
  • Patent number: 10782719
    Abstract: A voltage regulator includes a voltage converter is configured to generate an output power supply voltage based on an input power supply voltage and an input reference voltage and provide the output power supply voltage to an external functional circuit, the voltage converter including an output terminal configured to output the output power supply voltage; and a sinker connected to the output terminal, the sinker configured to generate a sink current in response to a sink enable signal while the external functional circuit is not driven and configured to block generation of the sink current in response to an operating enable signal while the external functional circuit is driven, wherein the sink current corresponds to a load current that is to be consumed while the external functional circuit is driven.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: September 22, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: June-Soo Kim, Kyeong-Do Kim, Eun-Jin Kim, Sang-Hyo Lee, Seung-Won Lee
  • Patent number: 10775822
    Abstract: Disclosed is a circuit for voltage regulation, the circuit including: an amplifier operable to generate an amplifier output signal according to a reference voltage and a negative feedback voltage; an adaptive pre-driver operable to generate a bias current according to the amplifier output signal or according to the amplifier output signal and a current-dependent signal that varies with the variation of an output current, in which the bias current varies with the variation of the output current; a driving circuit operable to generate an output voltage and the output current according to the amplifier output signal; and a negative feedback circuit operable to generate the negative feedback voltage according to the output voltage. Since the bias current varies with the variation of the output current, the output impedance of the adaptive pre-driver varies with the variation of the output current so that the stability of the circuit is improved.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: September 15, 2020
    Assignee: REALTEK SEMICONDUCTOR CORPORATION
    Inventor: Yuan-Ping Hsu
  • Patent number: 10756728
    Abstract: An insulated gate device drive apparatus for driving an insulated gate device by using a charging current outputted from a totem-pole output circuit constituted by a high-side output transistor and a low-side output transistor. The insulated gate device drive apparatus includes a charging current correction circuit configured to perform correction to increase the charging current that is decreased by an increased voltage drop of high-side wiring resistance between a power supply and the high-side output transistor.
    Type: Grant
    Filed: November 29, 2019
    Date of Patent: August 25, 2020
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Takahiro Mori, Motomitsu Iwamoto
  • Patent number: 10756628
    Abstract: An electronic circuit includes a switched-mode power supply powering a first load via a first linear voltage regulator. The first regulator includes a transistor. The substrate and the gate of the transistor are capable of being coupled to a node of application of a power supply voltage. A method of operating the circuit is also disclosed.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: August 25, 2020
    Assignee: STMicroelectronics (Rousset) SAS
    Inventors: Michel Cuenca, Cedric Thomas
  • Patent number: 10747249
    Abstract: A system includes: a reference buffer coupled to an input supply voltage; an analog-to-digital converter (ADC) coupled to an output of the reference buffer; and an output capacitor coupled between the output of the reference buffer and a ground node. The reference buffer includes: an integrator; an internal capacitor coupled between an output of the integrator and the ground node; a first gain stage with an input coupled to the output of the reference buffer; and a second gain stage with an input coupled to the output of the integrator. The output of the first gain stage is combined with the output of the integrator using a combine circuit.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: August 18, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Anand Subramanian, Anand Kannan
  • Patent number: 10686379
    Abstract: A switching power converter circuit comprises an inductor arranged to receive input energy from an input circuit node; a switch circuit coupled to the inductor; a load current sensing circuit element coupled to a regulated circuit node and an output circuit node; a compensation circuit coupled to a compensation circuit node; a control circuit coupled to the compensation circuit node and the switch circuit, the control circuit configured to modulate activation of the switch circuit to regulate a voltage at the regulated circuit node; and a feedforward circuit coupled to the load current sensing circuit element and the compensation circuit, and configured to adjust modulation of the switch circuit according to sensed load current.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: June 16, 2020
    Assignee: Linear Technology Holding, LLC
    Inventors: Yonghwan Cho, Keith Szolusha, Min Chen
  • Patent number: 10666141
    Abstract: A control device includes a first switch, a second switch, a switching circuit, a first circuit and a second circuit. The control device is selectively switched to a first mode or a second mode corresponding to an operating current and an operating state of a predetermined circuit. During the first mode, an output signal of the first circuit is transmitted to a control end of the first switch through the switching circuit, and the first circuit and the first switch form a low drop-out regulator. During the second mode, a plurality of driving signals of the second circuit are transmitted to the control end of the first switch and a control end of the second switch through the switching circuit, and the first switch, the second switch and an impedance circuit form a switching voltage converter.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: May 26, 2020
    Assignee: Nuvoton Technology Corporation
    Inventor: Cheng-Chih Wang
  • Patent number: 10658929
    Abstract: According to one embodiment of this disclosure, an apparatus is disclosed. The apparatus includes a voltage regulator configured to produce a regulated voltage, a plurality of current circuits coupled in parallel between an output node and a power node, each of the plurality of current circuits including first and second transistors coupled in series, the first transistor of each of the plurality of current circuits being biased with the regulated voltage, and a control circuit configured to activate the second transistor of selected one or ones of the plurality of current circuits responsive, at least in part, to a voltage at the output node.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: May 19, 2020
    Assignee: Micron Technology, Inc.
    Inventors: Yuanzhong Wan, Dong Pan
  • Patent number: 10650893
    Abstract: Numerous embodiments are disclosed for a high voltage generation algorithm and system for generating high voltages necessary for a particular programming operation in analog neural memory used in a deep learning artificial neural network. Different calibration algorithms and systems are also disclosed. Compensation measures are utilized to compensate for changes in voltage or current as the number of cells being programmed changes.
    Type: Grant
    Filed: August 25, 2019
    Date of Patent: May 12, 2020
    Assignee: SILICON STORAGE TECHNOLOGY, INC.
    Inventors: Hieu Van Tran, Thuan Vu, Stanley Hong, Anh Ly, Vipin Tiwari, Nhan Do
  • Patent number: 10651752
    Abstract: An isolated switching power converter communication channel is provided that comprises a pair of capacitors. A transmitter on a first side of a transformer for the converter transmits a transmitter signal over a first one of the capacitors. The transmitter also transmits a complement of the transmitter signal over a second one of the capacitors. A receiver on a second side of the transformer recovers a signal responsive to a high-pass-filtered difference of the received signals from the pair of capacitors.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: May 12, 2020
    Assignee: DIALOG SEMICONDUCTOR INC.
    Inventors: Wenduo Liu, Kun Yang
  • Patent number: 10635771
    Abstract: A method for parasitic-aware capacitor sizing and layout generation is proposed, which is executed by a computer, the method comprising using the computer to perform the following: creating a capacitor sizing and parasitic matching sequence to represent a unit capacitor size, routing topology and routing patterns of a plural of nets in a capacitor network. Next, a shielding assignment is performed to create a number of shielding portions of each net in the plural of nets. Then, a fitness evaluation of configurations of the capacitor sizing and parasitic matching sequence is performed. A shielding net routing is performed to compensate unmatched parasitic capacitance of the configurations of the capacitor sizing and parasitic matching sequence.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: April 28, 2020
    Assignee: AnaGlobe Technology, Inc.
    Inventors: Po-Hung Lin, Vincent Weihao Hsiao, Chun-Yu Lin, Nai-Chen Chen, Yu-Tsang Hsieh
  • Patent number: 10613566
    Abstract: A real-time slope control apparatus includes power-train transistors coupled between a power terminal and an output node and turned on in response to an error signal, a voltage regulator, a comparator configured to compare whether the feedback voltage and a sub-reference voltage match each other, pull-up transistors coupled between the power terminal and the output node and sequentially turned on in response to first control signals corresponding to a comparison result value of the comparator, and pull-down transistors coupled between the output node and the ground terminal and sequentially turned on in response to second control signals corresponding to the comparison result value of the comparator.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: April 7, 2020
    Assignee: Hyundai Autron Co., Ltd.
    Inventor: Ji Hoon Lim
  • Patent number: 10613571
    Abstract: A compensation circuit may include a reference current generating circuit including a first transistor of a first width configured to transfer a first current. The reference generating circuit may output a reference current based on the first current. The compensation circuit may include a compensation current generating circuit including a second transistor of a second width configured to transfer a second current. The second transistor may be selected from among a first group of transistors based on a code. The transistors of the first group may have widths proportional to the first width. The compensation current generating circuit may output a compensation current having a magnitude selected proportionally to a magnitude of the reference current based on the second current. The compensation circuit may include a current mirror circuit configured to output a compensation voltage having a magnitude based on a magnitude of the second current and the second width.
    Type: Grant
    Filed: January 24, 2019
    Date of Patent: April 7, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Surojit Sarkar, Vivek Venkata Kalluru, Youngsun Min, Ji-Hoon Lim
  • Patent number: 10534387
    Abstract: A power control integrated circuit (IC) chip can include a direct current (DC)-DC converter that outputs a switching voltage in response to a switching output enable signal. The power control IC chip can also include an inductor detect circuit that detects whether an inductor is conductively coupled to the DC-DC converter and a powered circuit component in response to an inductor detect signal. The power control IC chip can further include control logic that (i) controls the inductor detect signal based on an enable DC-DC signal and (ii) controls the switching output enable signal provided to the DC-DC converter and a linear output disable signal provided to a linear regulator based on a signal from the inductor detect circuit indicating whether the inductor is conductively coupled to the DC-DC converter and the powered circuit component.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: January 14, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Sachin Sudhir Turkewadikar, Nitin Agarwal, Madhan Radhakrishnan
  • Patent number: 10504564
    Abstract: Voltage regulators and related methods are described. The voltage regulators described in the application may include an operational amplifier, an output transistor, and a signal buffer connected between the operational amplifier and the output transistor. In some embodiments, these voltage regulators are used in connection with memory units. A voltage regulator may be arranged such that the signal amplifier clamps the voltage at the gate of the output transistor to the output voltage when the memory unit is in an idle mode. In this way, when the memory is accessed, the amplitude and duration of output voltage overshoots can be limited, relative to some voltage regulators.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: December 10, 2019
    Assignee: MediaTek Inc.
    Inventors: Wei-Chung Chen, Tzu-Chi Huang, Kuo-Chun Hsu
  • Patent number: 10474173
    Abstract: A voltage regulator is equipped with the first and the second source-grounded amplifier circuits connected to an output terminal of a differential amplifier circuit; a phase compensation circuit having a resistor part and a capacitor part, and connected between an output terminal of the first source-grounded amplifier circuit and an output terminal of the second source-grounded amplifier circuit; and an output transistor connected to the output terminal of the second source-grounded amplifier circuit. At least one of the resistor part and the capacitor part of the phase compensation circuit has a filter.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: November 12, 2019
    Assignee: ABLIC INC.
    Inventor: Shingo Nakashima
  • Patent number: 10476557
    Abstract: Certain aspects of the present disclosure relate to methods and apparatus for wireless communication. In certain aspects, the apparatus generally includes a first interface configured to obtain, from a baseband module, a multiplexed signal comprising a control signal, a second interface configured to obtain a power signal, a radio frequency (RF) module, a regulator coupled to the second interface and configured to receive the power signal, and a circuit configured to provide the control signal to the regulator. In certain aspects, the regulator, in response to the control signal, may be configured to generate a supply voltage signal by regulating the power signal and provide the supply voltage signal to the RF module.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: November 12, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Arnon Sattinger, Yossi Herzog
  • Patent number: 10429867
    Abstract: The disclosure provides an LDO voltage regulator circuit and a related method. The circuit includes an error amplifier having a localized common-mode feedback circuit, receiving a reference voltage, a feedback voltage, and an input voltage, and generating an amplified error voltage; a pass element having a power transistor, receiving the amplified error voltage, and generating an output voltage; a feedback circuit receiving the output voltage and having a voltage divider which scales down the output voltage; a first compensation element having a first terminal which connects to an output of the input differential transistor pair and a second terminal which receives the output voltage; and a second compensation element having a third terminal which receives the output voltage and connects to the second terminal and a fourth terminal which connects to an input of a first transistor pair of the localized common-mode feedback circuit.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: October 1, 2019
    Assignee: Winbond Electronics Corp.
    Inventor: Jungung Kim
  • Patent number: 10423176
    Abstract: A low-dropout regulator comprises a first switching transistor, a comparator, and a Miller capacitor. The first terminal of the first switching transistor is connected to a load, and the second terminal of the first switching transistor is connected to a power supply voltage. The first input terminal of the comparator is connected to a reference voltage, the second input terminal of the comparator is connected to the first terminal of the first switching transistor, and the output terminal of the comparator is connected to the control terminal of the first switching transistor. The first terminal of the Miller capacitor is connected to the control terminal of the first switching transistor, and the second terminal of the Miller capacitor is connected to the first terminal of the first switching transistor and the load.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: September 24, 2019
    Assignee: Yangtze Memory Technologies Co., Ltd.
    Inventors: Feng Pan, Zhenyu Lu, Steve Weiyi Yang, Simon Shi-Ning Yang
  • Patent number: 10396667
    Abstract: There is provided a DC-DC converter which is safe and secure, but yet with low power consumption. The DC-DC converter is configured such that an overcurrent protection circuit is operated intermittently only for a predetermined period of time based on a signal output from an output control circuit to turn on a switching element.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: August 27, 2019
    Assignee: ABLIC INC.
    Inventors: Akihiro Kawano, Katsuya Goto
  • Patent number: 10396717
    Abstract: Disclosed is a power control method for a radio frequency power amplifier, comprising the following steps: S1. reading a power source voltage signal and a power control signal and generating an amplified signal having a linear relationship with the power control signal; S2. according to the amplified signal and saturation information, generating one or more controlled currents, merging each controlled current, and converting the merged total current into voltage; S3. Conducting linear voltage regulation on the converted voltage and generating a base control voltage of the radio frequency power amplifier. The present invention dynamically monitors the saturation information of a pass element to change the base voltage of the radio frequency power amplifier, thus improving additional power efficiency of the radio frequency power amplifier at multiple power level and over a large power source voltage range, and improving the properties of the radio frequency switch thereof.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: August 27, 2019
    Assignee: BEIJING VANCHIP TECHNOLOGIES CO., LTD.
    Inventor: Xida Liu
  • Patent number: 10317921
    Abstract: A power supply is disclosed. The power supply includes a first switch and a second switch. The gate of the first switch is coupled to the gate of the second switch. The power supply further includes a cutoff switch coupled between the first switch and an input voltage port. A comparator is included for comparing a voltage at a feedback port with a fixed reference voltage. The comparator opens the cutoff switch when the voltage at the feedback port is lower than the fixed reference voltage.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: June 11, 2019
    Assignee: NXP USA, Inc.
    Inventor: Xianghua Shen
  • Patent number: 10310530
    Abstract: A circuit comprises: a pass transistor; a first transistor comprising a gate coupled to the gate of the pass transistor, a source coupled to the source of the pass transistor, and a drain; a second transistor comprising a gate coupled to the gate of the pass transistor, a source coupled to the source of the pass transistor, and a drain; a first current mirror coupled to the drain of the first transistor; a second current mirror coupled to the drain of the second transistor, and coupled to the first current mirror; a feedback voltage circuit coupled to the drain of the pass transistor; an error amplifier comprising a first input port coupled to the feedback voltage circuit, and an output port coupled to the gate of the pass transistor; and a capacitor coupled to the second current mirror and to the first input port of the error amplifier.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: June 4, 2019
    Assignee: Texas Instruments Incorporated
    Inventors: Feng Lu, Qingjie Ma
  • Patent number: 10296029
    Abstract: Devices and methods to design voltage regulators requiring lower power consumption, wide output current and input voltage range, low dropout, and small footprint. The disclosed methods and devices provide solutions to stabilize such regulators in the presence of widely varying loads by tracking a pole of the transfer function, the pole of the transfer function corresponding to a combination of the load capacitance and the load resistance.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: May 21, 2019
    Assignee: pSemi Corporation
    Inventor: Gary Chunshein Wu
  • Patent number: 10281943
    Abstract: A low dropout voltage regulator incorporates an N-channel MOS pass transistor, a main error amplifier, a first buffer circuit, an auxiliary error amplifier, a second buffer circuit, and a decision circuit. The auxiliary error amplifier consumes less bias current. In one embodiment, the decision circuit compares the portion of the output voltage with a bias voltage to control the gate of the N-channel MOS pass transistor, wherein the value of the bias voltage is less than the value of the reference voltage.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: May 7, 2019
    Assignee: ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC.
    Inventor: I-Hsiu Ho
  • Patent number: 10270338
    Abstract: In some examples, a shunt regulator includes a plurality of selection pins configured to receive a digital signal. The shunt regulator also includes an internal reference voltage selection circuit coupled to the plurality of selection pins, the internal reference voltage selection circuit configured to select a first internal reference voltage of the shunt regulator based on the digital signal. The shunt regulator further includes a soft ramp control circuit coupled to the internal reference voltage selection circuit and to a soft ramp control pin that is configured to carry a second internal reference voltage, the soft ramp control circuit configured to compare the first and the second internal reference voltages to generate a soft ramp control output signal.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: April 23, 2019
    Assignee: Texas Instruments Incorporated
    Inventors: Kumar G. Santhosh, Xiadong Cai, Aditya Ambardar, Rahul Mishra
  • Patent number: 10254778
    Abstract: Compensation circuits, compensated voltage regulators, and methods are provided for stabilizing voltage regulators, or other circuits that use operational amplifiers, over a wide range of output current. The described techniques provide a zero whose frequency varies linearly with an output current, and which can be used to track and compensate for a pole whose frequency similarly varies with the output current. The variable-frequency zero is created using a compensation capacitor placed in series with a variable resistance, wherein the resistance is configured to vary linearly with the output current. A pole-tracking zero generated in this way may be used to overcome difficulties encountered when the gain of a system includes a pole whose frequency varies with output current, and serves to improve the phase margin of amplifier circuitry, including that used within voltage regulators, and/or serves to ensure stability over a wide range of output current.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: April 9, 2019
    Assignee: Infineon Technologies Austria AG
    Inventors: Adriano Sambucco, Emiliano Alejandro Puia