Temperature Or Current Responsive Means In Circuit Patents (Class 331/176)
  • Patent number: 9762180
    Abstract: An oscillator includes a front side voltage divider, a rear side voltage divider, and an oscillation unit. The front side voltage divider includes a first resistor connected between a first and second potential sources, and a first output terminal configured to changeably connect to a connection position in the first resistor so as to vary an obtained output voltage. The rear side voltage divider includes a second resistor connected between the first output terminal and a third potential source; and a second output terminal configured to changeably connect to a connection position in the second resistor so as to vary an obtained output voltage. The oscillation unit includes a variable capacitance element with a capacitance varied according to the output voltage from the second output terminal. The oscillation unit varies an output frequency based on a variation in a resonance point associated with a variation in the capacitance.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: September 12, 2017
    Assignee: NIHON DEMPA KOGYO CO., LTD.
    Inventor: Tsuyoshi Shiobara
  • Patent number: 9716501
    Abstract: A CR oscillation circuit includes inverters forming a loop for circulation of a signal, CR time constant circuits inserted into the loop for delaying the signal, each circuit having a capacitor, a plurality of resistance elements, and a transmission gate that selects an arbitrary resistance element of the plurality of resistance elements as a charge and discharge path of the capacitor, and a gate voltage generation circuit as means for outputting a gate voltage for controlling ON/OFF of each transmission gate that outputs a constant voltage in conjunction of a threshold voltage of a field-effect transistor as a gate voltage for turning ON the transmission gate.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: July 25, 2017
    Assignee: Seiko Epson Corporation
    Inventor: Akira Shirao
  • Patent number: 9703963
    Abstract: A method of energy usage data privacy preservation is described. The method includes downloading energy usage data and a signature from a repository. The method includes determining whether the signature is that of a utility. When the signature is not that of the utility, the method includes rejecting the energy usage data. When the signature is that of the utility, the method includes generating noisy data, encrypting a message-signature pair, constructing a proof, and communicating the noisy data, the encrypted message-signature pair, and the proof to a third party. The noisy data is generated by adding random noise to the energy usage data. The message-signature pair includes the energy usage data and a verified signature. The proof is configured to establish that the encrypted message-signature pair and the noisy data are members of a corresponding proof language.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: July 11, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Arnab Roy, Daisuke Mashima
  • Patent number: 9660581
    Abstract: An oscillation circuit includes a circuit for oscillation, a first frequency adjustment circuit for adjusting a frequency, and a first terminal. The oscillation circuit has a first mode in which the circuit for oscillation and the first frequency adjustment circuit are electrically connected to each other and the first frequency adjustment circuit and the first terminal are not electrically connected to each other, and a second mode in which the circuit for oscillation and the first frequency adjustment circuit operate and a terminal on a side where a signal of the first frequency adjustment circuit is output and the first terminal are electrically connected to each other.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: May 23, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Yosuke Itasaka, Atsushi Kiyohara
  • Patent number: 9612607
    Abstract: A simple bandgap current generator combines a PTAT (proportional to absolute temperature) base-emitter voltage (VBE) measured across two binary junction devices (?VBE=VBE1?VBE2) with a current that is varied by an nWell resistor with a positive temperature coefficient to produce a CTAT (complementary to absolute temperature) current instead of PTAT reference current. One of the base-emitter voltages is constrained to be VBE1=VBE(1?T). This reduces the temperature dependency of a reference current generated by the bandgap generator. This reference current may be used to generate a bandgap reference voltage by adding an IR drop to a diode voltage or to a base-emitter voltage. The simple bandgap circuit is significantly smaller in size than a precision bandgap circuit, but still provides a voltage and/or a current reference signal having a good accuracy.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: April 4, 2017
    Assignee: TEXAS INSTUMENTS INCORPORATED
    Inventors: Ajay Kumar, Rahul Bhandarkar
  • Patent number: 9608600
    Abstract: Apparatus and methods are disclosed related to tuning a resonant frequency of an LC circuit. In some implementations, the LC circuit can be embodied in a low noise amplifier (LNA) of a receiver. The receiver can include a component configured to generate an indicator of received signal strength indication (RSSI) of a radio frequency (RF) signal received by the receiver. A control block can adjust the resonant frequency of the LC circuit based at least in part on the indicator of RSSI. As another example, the receiver can include an oscillator, such as a VCO, separate from the LC circuit that can be used to tune the resonant frequency of the LC circuit. These apparatus can compensate for variation in a zero imaginary component of an impedance across the LC circuit.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: March 28, 2017
    Assignee: Analog Devices, Inc.
    Inventor: Hyman Shanan
  • Patent number: 9548744
    Abstract: In some examples, compensating for hysteretic characteristics of a crystal oscillator in a timing circuit includes obtaining a plurality of successive temperature measurements. From the plurality of successive temperature measurements, a temperature gradient having a sign and a magnitude can be determined. A frequency compensation parameter can then be determined based on any combination of two or more factors chosen from a set of factors including a temperature measurement, the sign of the temperature gradient, and the magnitude of the temperature gradient. A frequency error of the timing circuit can then be compensated based on the frequency compensation parameter.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: January 17, 2017
    Assignee: QUALCOMM INCORPORATED
    Inventors: Vishal Agarwal, Mahadevan Srinivasan
  • Patent number: 9484855
    Abstract: Clock synchronization error is corrected or minimized by fitting a parabolic f(T) function to the crystal's data, and compensating for sampling period drift in an Analog to Digital Converter (ADC) at various temperatures.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: November 1, 2016
    Assignee: Cornell University
    Inventors: Harold Cheyne, Adam Strickhart, Peter Marchetto, Raymond Mack
  • Patent number: 9455719
    Abstract: A first oscillator generates a first frequency. A second oscillator generates a second frequency. A controller determines a difference between the first frequency and the second frequency and determines a non-ideal component of the first frequency in dependence on a temperature response of the first and second oscillators.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: September 27, 2016
    Assignee: STMicroelectronics (Research & Development) Limited
    Inventors: Philip Mattos, Peter Bagnall
  • Patent number: 9433105
    Abstract: An electrically insulating substrate is provided. The electrically insulating substrate includes a set of areas to be formed into a set of printed circuit boards. Each of the set of areas is separated from others of the set of areas by a dicing channel. A set of signal wiring conductors is fabricated onto the set of areas of the electrically insulating substrate so that at least one of the set of signal wiring conductors terminates proximate to the dicing channel. A set of plated through holes is fabricated through at least one of the set of areas such that at least one of the set of plated through holes connects to at least one of the set of signal wiring conductors. The electrically insulating substrate is singulated along a set of singulation lines to form the set of printed circuit boards. The singulation lines intersect with the plated through holes, so that a portion of the plated through holes is exposed along the peripheral edge of the resulting printed circuit boards.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: August 30, 2016
    Assignee: International Business Machines Corporation
    Inventors: Richard Stephen Graf, Thomas Edward Lombardi, Sudipta Kumar Ray, David Justin West
  • Patent number: 9397669
    Abstract: A method and device for calibrating an oscillator and a temperature sensor in an electronic device are provided. A same temperature cycle, which includes at least two distinct temperatures, may be used to obtain data to calibrate both the oscillator and the temperature sensor. One of the distinct temperatures may comprise an ambient temperature, and a second distinct temperature may comprise a heated temperature greater than the ambient temperature. The electronic device (or a calibration device separate from the electronic device) may receive the readings from the oscillator and the temperature sensor at the two distinct temperatures in the same temperature cycle, and may determine an oscillator correction factor and a temperature sensor correction factor.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: July 19, 2016
    Assignee: SanDisk Technologies LLC
    Inventors: Deepak Pancholi, Bhavin Odedara
  • Patent number: 9385649
    Abstract: Cancelling a delay in a comparator of an RC oscillator configured to generate a clock pulse, including: selectively coupling a plurality of current sources to a first capacitor, a second capacitor, and a resistor, wherein the plurality of current source charge and discharge the first capacitor and the second capacitor, and charge the resistor; charging the first capacitor at a higher rate during a first phase of the clock pulse than a second phase of the clock pulse, and charging the second capacitor at a higher rate during a third phase of the clock pulse than a fourth phase of the clock pulse; and generating the clock pulse by enabling the comparator to compare a voltage on the first or second capacitor with a voltage on the resistor.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: July 5, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Le Wang, Arash Mehrabi
  • Patent number: 9379662
    Abstract: A system using temperature tracking for a controlled oscillator (CO) is provided. The system includes at least one coarse tuning capacitor circuit including a plurality of selectable coarse tuning capacitors operable in at least three modes of operation, thereby allowing switching between each coarse capacitor of the plurality of selectable coarse capacitors when a selected coarse tuning capacitor has reached one of its high tuning range and low tuning range.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: June 28, 2016
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Wing Fai Loke, Chih-Wei Yao
  • Patent number: 9374037
    Abstract: An apparatus having a substrate with an inductor, a first die and a second die is disclosed. The first die may be (i) mounted on the substrate, (ii) configured to vary a frequency of a signal in the inductor, and (iii) fabricated with multiple first masks. The second die may be (i) mounted on the substrate, (ii) configured to excite the signal, and (iii) fabricated with multiple second masks. A particular one of the first masks generally has several designs that customize the first die to several configurations respectively. A particular one of the second masks may have several designs that customize the second die to several configurations respectively. The first die, the second die and the inductor may form a voltage-controlled oscillator. A selected first design and a selected second design generally establish multiple performances of the voltage-controlled oscillator.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: June 21, 2016
    Assignee: M/A-COM Technology Solutions Holdings, Inc.
    Inventors: Wayne M. Struble, Eoin Carey, Ronan G. Brady, Shane M. Collins
  • Patent number: 9362929
    Abstract: This disclosure relates to controlling an oscillator based on a measurement of a frequency reference. A controller determines a control value to control the oscillator based on multiple error values. Each error value is indicative of a measurement of a frequency difference between the oscillator and a frequency reference over a period of time. The determination of the error value is further based on an application time value indicative of a time of application of the control value to the oscillator. Since the control value is based on the application time the controller can compensate for inaccuracies arising from both evolution of the oscillator between measurements and applying the correction at a later time after the measurement. Further, since the multiple error values represent a frequency difference over different periods of time, the controller can compensate for wide range of statistical effects.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: June 7, 2016
    Assignee: The University of Sydney
    Inventors: Jarrah Sastrawan, Michael J. Biercuk
  • Patent number: 9362922
    Abstract: The present invention relates to an oscillator circuit, comprising a switched capacitor circuit comprising a parallel circuit with a current input to be supplied with a reference current on one side and being connected to a reference terminal on the other side. The parallel circuit further comprises a first capacitor in a first branch and, in a second branch, a second capacitor connected in-between a first and second switch. A switch control unit comprises a first input coupled to the current input of the parallel circuit and a second input to be supplied with a reference voltage as well as an oscillator output for providing an oscillator signal. The switch control unit is being designed to operate the first and second switch such that, in a charging phase, the first and second capacitor is charged to a respective level depending on the reference voltage and, in a discharging phase, the charge stored on the first capacitor is discharged using the charge stored on the second capacitor.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: June 7, 2016
    Assignee: ams AG
    Inventor: Gregor Schatzberger
  • Patent number: 9361969
    Abstract: A semiconductor device includes a periodic signal generating circuit for generating a periodic signal having a set period regardless of changes in temperature in response to a first trimming signal as a default value and controlling the set period of the periodic signal based on the temperature in response to a second trimming signal, and an internal circuit to perform a set operation in response to the periodic signal.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: June 7, 2016
    Assignee: SK Hynix Inc.
    Inventors: Yong-Ju Kim, Dae-Han Kwon, Hae-Rang Choi, Jae-Min Jang
  • Patent number: 9362921
    Abstract: A temperature-compensated piezoelectric oscillator as an oscillator includes a piezoelectric resonator incorporating a resonator element, an electronic component (IC) as a circuit element having a function of driving the resonator element and a thermosensor, and a wiring board provided with a conductor film, and the piezoelectric resonator element and the electronic component (IC) are disposed side by side in an area where the conductor film is disposed.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: June 7, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Takuya Owaki, Hideyuki Kanno
  • Patent number: 9342054
    Abstract: Various embodiments of the invention relate generally to real-time clock circuit, and more particularly to systems, devices and methods of integrating two oscillators in one real-time clock circuit to generate accurate time of day over an industrial temperature range. A primary oscillator is employed to generate a first high precision clock while having a higher frequency and consuming more power; a secondary oscillator is employed to generate a second clock that has a low frequency and consumes less power, but may not meet the time accuracy requirement. When the real-time clock is provided with sufficient power (MSN mode), time of day is constantly tracked by the primary oscillator, but when the real-time clock is powered by a battery (SLEEP mode), time of day is tracked by the secondary oscillator while the primary oscillator is switched on at an update frequency to compensate errors in the time of day.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: May 17, 2016
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Bertram John White, Nathan Theodore Hackett
  • Patent number: 9344033
    Abstract: A variable capacitance circuit includes a plurality of variable capacitance elements (varicaps) each having the capacitance value controlled in accordance with the inter-terminal voltage applied between the terminals of the variable capacitance element and connected in parallel to each other, has the combined capacitance value of the plurality of variable capacitance elements variable taking a predetermined capacitance value as a base, sets the inter-terminal voltage of at least one of the plurality of variable capacitance elements to a first voltage as a variable voltage, and sets the inter-terminal voltage of the rest of the plurality of variable capacitance elements to a second voltage as a stationary voltage.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: May 17, 2016
    Assignee: Seiko Epson Corporation
    Inventor: Hisahiro Ito
  • Patent number: 9325328
    Abstract: An oscillation circuit includes a voltage controlled oscillation circuit that includes a variable capacitance circuit provided with a variable capacitance element whose capacitance value is controlled on the basis of a control voltage and oscillates a vibrator so as to generate an oscillation signal, and a fractional N-PLL circuit that receives the oscillation signal generated by the voltage controlled oscillation circuit and includes a voltage controlled oscillator which controls an oscillation frequency on the basis of control input data (an integral division ratio and a fractional division ratio).
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: April 26, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Mitsuaki Sawada, Yuichi Toriumi
  • Patent number: 9325325
    Abstract: A method includes generation of a first current proportional to absolute temperature and formation of a second current representative of the temperature variation of the threshold voltages of the transistors of the inverter and limited to a fraction of the first current. This fraction is less than one. The inverter is supplied with a supply current equal to the first current minus the limited second current.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: April 26, 2016
    Assignee: STMicroelectronics (Rousset) SAS
    Inventors: Bruno Gailhard, Michel Cuenca
  • Patent number: 9318373
    Abstract: A semiconductor device (400) for improved charge dissipation protection includes a substrate (426), a layer of semiconductive or conductive material (406), one or more thin film devices (408) and a charge passage device (414). The thin film devices (408) are connected to the semiconductive or conductive layer (406) and the charge passage device (414) is coupled to the thin film devices (408) and to the substrate (426) and provides a connection from the thin film devices (408) to the substrate (426) to dissipate charge from the semiconductive/conductive layer (406) to the substrate (426).
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: April 19, 2016
    Assignee: CYPRESS SEMICONDUCTOR CORPORATION
    Inventors: David M Rogers, Mimi X Qian, Kwadwo A Appiah, Mark Randolph, Michael A VanBuskirk, Tazrien Kamal, Hiroyuki Kinoshita, Yi He, Wei Zheng
  • Patent number: 9306580
    Abstract: An oscillation circuit includes a circuit for frequency adjustment, a variable capacity control circuit in which a voltage to be output therefrom is controlled with either a voltage which is input from a terminal T1 or a voltage other than the voltage which is input from the terminal T1, a circuit for oscillation which is provided with a varactor and to which a signal from the circuit for frequency adjustment and a signal from the variable capacity control circuit are input, and a three-terminal switch which outputs the voltage which is input from the terminal T1 to either the circuit for frequency adjustment or the variable capacity control circuit.
    Type: Grant
    Filed: November 5, 2014
    Date of Patent: April 5, 2016
    Assignee: Seiko Epson Corporation
    Inventor: Atsushi Kiyohara
  • Patent number: 9294101
    Abstract: An oscillator IC includes a VDD terminal (first terminal), an OUT terminal (second terminal), an oscillation circuit for oscillating a resonator element, a mode switching circuit that switches between a normal mode (the first mode in which an oscillation signal output by the oscillation circuit is output from the OUT terminal) and a serial I/F mode (the second mode in which a signal than the oscillation signal is output or input from the OUT terminal) based on a voltage of the VDD terminal, and a control circuit that controls stop of the oscillation circuit in the serial I/F mode based on setting information that can be changed from outside.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: March 22, 2016
    Assignee: Seiko Epson Corporation
    Inventor: Mihiro Nonoyama
  • Patent number: 9289422
    Abstract: A method includes holding in a memory of a receiver, for each temperature in a range of temperatures, a respective first parameter indicative of a frequency error of a crystal oscillator in the receiver at the temperature, and a respective second parameter indicative of an uncertainty of the first parameter. An operating temperature of the crystal oscillator is measured. One or more frequencies, for initial acquisition of signals from a transmitter, are selected based on the first and second parameters corresponding to the measured operating temperature. The receiver is tuned to receive the signals from the transmitter on at least one of the selected frequencies.
    Type: Grant
    Filed: March 18, 2012
    Date of Patent: March 22, 2016
    Assignee: MARVELL WORLD TRADE LTD.
    Inventors: David Ben-Eli, Alexander Zaslavsky
  • Patent number: 9281822
    Abstract: An oscillator includes a voltage controlled oscillator, a PLL circuit, a crystal unit and an oscillator circuit configured to generate a clock, a digital control circuit, and a clock switching unit. The digital control circuit is configured to set an oscillation parameter of the oscillator circuit, and a parameter of the PLL circuit. The clock switching unit is configured to supply an output signal of the voltage controlled oscillator to the digital control circuit as a clock signal so as to cause the digital control circuit to operate using the clock signal when powered on, and configured to supply an output signal of the oscillator circuit to the digital control circuit as a clock signal after the digital control circuit sets the oscillation parameter of the oscillator circuit. An initial voltage is supplied to the voltage controlled oscillator as a control voltage when the oscillator is powered on.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: March 8, 2016
    Assignee: NIHON DEMPA KOGYO CO., LTD.
    Inventor: Tomoya Yorita
  • Patent number: 9252780
    Abstract: To determine the level of frequency drift of a crystal oscillator as a result of a change in the its temperature, the temperature of the crystal oscillator is sensed and used together with previously stored data that includes a multitude of drift values of the frequency of the crystal oscillator each associated with a temperature of the crystal oscillator. Optionally, upon initialization of a GPS receiver in which the crystal oscillator is disposed, an initial temperature of the crystal oscillator is measured and a PLL is set to an initial frequency in association with the initial temperature. When acquisition fails in a region, the ppm region is changed. The temperature of the crystal oscillator is periodically measured and compared with the initial temperature, and the acquisition process is reset if there is a significant change in temperature. The GPS processor enters the tracking phase when acquisition is successful.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: February 2, 2016
    Assignee: MaxLinear, Inc.
    Inventors: Anand K. Anandakumar, Hyungjin Kim, Curtis Ling
  • Patent number: 9252781
    Abstract: An oscillator uses a differential signal corresponding to a difference between an oscillation output f1 of a first oscillator circuit and an oscillation output f2 of a second oscillator circuit as a temperature detection value, and outputs a control signal for reducing an influence caused by a temperature characteristic of the oscillation output f1 based on the differential signal. The oscillator includes a switching unit configured to alternately switch between a first state where a first connecting terminal and a second connecting terminal are connected to a storage unit for access of an external computer to the storage unit, and a second state where the first connecting terminal and the second connecting terminal are respectively connected to a first signal path and a second signal path via a frequency reduction unit such that the output signals from the frequency reduction unit are extracted to an external frequency measuring unit.
    Type: Grant
    Filed: July 27, 2014
    Date of Patent: February 2, 2016
    Assignee: NIHON DEMPA KOGYO CO., LTD.
    Inventor: Tomoya Yorita
  • Patent number: 9240793
    Abstract: A method for stabilizing the output frequency of an oscillator comprises providing a temperature model to capture the temperature characteristics of a second oscillator when measured by a first oscillator, measuring a value indicative of the frequency of the second oscillator by using the first oscillator, determine a temperature of the second oscillator based on the measured value indicative of the frequency of the second oscillator and the temperature model, determining a compensation amount for the frequency of the first oscillator from the determined temperature, and providing a compensated output frequency of the first oscillator as a stabilized output.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: January 19, 2016
    Assignee: Dialog Semiconductor GmbH
    Inventor: Adam Malpass
  • Patent number: 9225339
    Abstract: An electronic device may include a voltage controlled oscillator (VCO) and a temperature sensor. The electronic device may also include a controller configured to cooperate with the VCO and the temperature sensor to determine both a temperature and a frequency error of the VCO for each of a plurality of most recent samples. Each of the most recent samples may have a given age associated therewith. The controller may also be configured to align the temperature, the frequency error, and the given age for each of most recent samples in a three-dimensional (3D) coordinate system having respective temperature, frequency error and age axes. The controller may also be configured to estimate a predicted frequency error of the VCO based upon the aligned temperature, frequency error, and given age of the most recent samples.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: December 29, 2015
    Assignee: BLACKBERRY LIMITED
    Inventors: Grant Henry Robert Bartnik, Ryan Jeffrey Hickey
  • Patent number: 9182771
    Abstract: A NFC enabled device to couple inductively to the H field of an RF signal and a regulator to regulate a voltage derived from an RF signal inductively coupled to the inductive coupler. The regulator has at least one voltage controlled impedance having a switch on voltage. A regulator controller provides a control voltage to each voltage controlled impedance such as that the control voltage is not less than the switch on voltage of the voltage controlled impedance.
    Type: Grant
    Filed: November 26, 2009
    Date of Patent: November 10, 2015
    Assignee: Broadcom Europe Limited
    Inventors: Paul Butler, David Miles, Robin Wilson
  • Patent number: 9166052
    Abstract: A multiple gate semiconductor structure is disclosed having a thin segment of semiconductor with first and second major surfaces that are opposite one another, a first gate on the first major surface of the segment, a second gate on the second major surface of the segment opposite the first gate, a first differential input coupled to the first gate, and a second differential input coupled to the second gate. Preferably the semiconductor structure is symmetrical about a plane that extends through the thin segment between the first and second major surfaces. When a first voltage of a first polarity is applied to the first input and a second voltage of the same magnitude as that of the first voltage but of opposite polarity is applied to the second input, a virtual ground is established in the structure near its center of the segment.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: October 20, 2015
    Assignee: Altera Corporation
    Inventors: Chun Lee Ler, Shuxian Chen, Jeffrey T. Watt
  • Patent number: 9154139
    Abstract: A crystal controlled oscillator of the present disclosure includes: an oscillator circuit for oscillator output, a first oscillator circuit, a second oscillator circuit, a heating unit, a pulse generator, a frequency difference detector, an addition unit, a circuit unit, a frequency measuring unit, a determination unit, and a signal selector. The signal selector is configured to: select a control signal where electric power supplied to the heating unit is smaller than supplied electric power in the detection range in a case where a frequency in a set period at the train of pulses is out of the detection range at the high temperature side; select a control signal where electric power supplied to the heating unit becomes a preset value in a case where a frequency in the set period at the train of pulses is out of the detection range at the low temperature side.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: October 6, 2015
    Assignee: NIHON DEMPA KOGYO CO., LTD.
    Inventors: Kazuo Akaike, Kaoru Kobayashi
  • Patent number: 9046552
    Abstract: Described is an apparatus to trim on-die passive components. The apparatus comprises: a resistor-capacitor (RC) dominated oscillator independent of first order transistor speed dependency, wherein the RC dominated oscillator including one or more resistors and capacitors with programmable resistance and capacitance, and wherein the RC dominated oscillator to generate an output signal having a frequency depending substantially on values of the programmable resistance and capacitance; and a trim-able resistor or capacitor operable to be trimmed, for compensating process variations, according to a program code associated with the programmable resistance and capacitance of the RC dominated oscillator.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: June 2, 2015
    Assignee: Intel Corporation
    Inventors: Fabrice Paillet, Gerhard Schrom, Alexander Lyakhov, George L. Geannopoulos, Ravi Sankar Vunnam, J. Keith Hodgson
  • Patent number: 9041478
    Abstract: An electronic oscillator circuit has a first oscillator, for supplying a first oscillation signal, a second oscillator, for supplying a second oscillation signal, a first controller for delivering the first control signal as a function of a phase difference between a first controller input and a second controller input of the first controller; a second controller for delivering the second control signal as a function of a phase difference between a first controller input of the second controller and a second controller input of the second controller; a resonator; at least a second resonance frequency, with a first phase shift dependent on the difference between the frequency of a second exciting signal and the second resonance frequency and processing means, for receiving the first oscillator signal and the second oscillator signal, determining their mutual proportion, looking up a frequency compensation factor in a prestored table and outputting a compensated oscillation signal.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: May 26, 2015
    Assignee: ANHARMONIC B.V.
    Inventor: Antonius Johannes Maria Montagne
  • Patent number: 9038263
    Abstract: Arrays of resonator sensors include an active wafer array comprising a plurality of active wafers, a first end cap array coupled to a first side of the active wafer array, and a second end cap array coupled to a second side of the active wafer array. Thickness shear mode resonator sensors may include an active wafer coupled to a first end cap and a second end cap. Methods of forming a plurality of resonator sensors include forming a plurality of active wafer locations and separating the active wafer locations to form a plurality of discrete resonator sensors. Thickness shear mode resonator sensors may be produced by such methods.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: May 26, 2015
    Assignee: Delaware Capital Formation, Inc.
    Inventors: Derek Wayne Puccio, Errol P. EerNisse
  • Patent number: 9024693
    Abstract: A crystal-less clock generator (CLCG) and an operation method thereof are provided. The CLCG includes a first oscillation circuit, a second oscillation circuit, and a control circuit. The first oscillation circuit is controlled by a control signal for generating an output clock signal of the CLCG. The second oscillation circuit generates a reference clock signal. The control circuit is coupled to the first oscillation circuit for receiving the output clock signal and coupled to the second oscillation circuit for receiving the reference clock signal. The control circuit is used to generate the control signal for the first oscillation circuit according to the relationship between the output clock signal and the reference clock signal.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: May 5, 2015
    Assignee: Industrial Technology Research Institute
    Inventors: Jen-Chieh Liu, Chi-Yang Chang, Yo-Hao Tu, Kuo-Hsing Cheng
  • Patent number: 9024698
    Abstract: Embodiments of the present invention provide a temperature compensation method and a crystal oscillator, where the crystal oscillator includes a crystal oscillation circuit unit, a temperature sensor unit, an oscillation controlling unit, a relative temperature calculating unit, and a temperature compensating unit. The temperature sensor unit measures a measured temperature of the crystal oscillation circuit unit; the relative temperature calculating unit obtains a temperature difference between the measured temperature and a reference temperature; the temperature compensating unit obtains a temperature compensation value corresponding to the temperature difference from a temperature-frequency curve; and the oscillation controlling unit generates a frequency control signal, according to a frequency tracked by a communications AFC device and the temperature compensation value, thereby controlling a frequency of the crystal oscillation circuit unit to work on the tracked frequency.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: May 5, 2015
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Qiang Zhang
  • Patent number: 9019027
    Abstract: An oscillation device is provided. The oscillation device includes: a main circuit portion, a heating unit, first and second crystal units, first and second oscillator circuits, a frequency difference detector, a first addition unit, an integration circuit unit, a circuit unit configured to control an electric power to be supplied to the heating unit, a compensation value obtaining unit, and a second addition unit. The compensation value obtaining unit is configured to obtain a frequency compensation value for compensating an output frequency of the main circuit portion based on an integrated value output from the integration circuit unit, and based on a change in the clock signal due to a difference between the temperature of the atmosphere and the temperature setting value of the heating unit. The second addition unit is configured to add the frequency compensation value to a frequency setting value.
    Type: Grant
    Filed: September 26, 2013
    Date of Patent: April 28, 2015
    Assignee: Nihon Dempa Kogyo Co., Ltd.
    Inventors: Kazuo Akaike, Tsukasa Kobata, Shinichi Sato
  • Patent number: 9019023
    Abstract: An oscillator outputs a control signal to suppress an influence caused by temperature characteristic of f1 based on a differential signal corresponding to difference between an oscillation output f1 of a first oscillator circuit and an oscillation output f2 of a second oscillator circuit treated as a temperature detection value. A switching unit switches between a first state and a second state. The first state is a state where a first connecting end and a second connecting end are connected to a storage unit for access from an external computer to the storage unit. The second state is a state where the first connecting end and the second connecting end are connected to a first signal path and a second signal path such that the respective f1 and f2 are retrieved from the first connecting end and the second connecting end to an external frequency measuring unit.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: April 28, 2015
    Assignee: Nihon Dempa Kogyo Co., Ltd.
    Inventor: Tomoya Yorita
  • Patent number: 9013244
    Abstract: An oscillating device includes a temperature compensated oscillator that compensates a frequency temperature characteristic in a temperature compensation range including apart of a first temperature range, and a temperature control circuit that includes a heater and controls a temperature of a quartz crystal resonator of the temperature compensated oscillator into a second temperature range included in the temperature compensation range. Further, the temperature compensation range of the temperature compensated oscillator may include a part of the first temperature range in which compensation can be performed by first-order approximation.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: April 21, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Motohiro Tokuhashi
  • Patent number: 9007134
    Abstract: A constant-temperature piezoelectric oscillator includes: a piezoelectric vibrator; an oscillation circuit; a frequency voltage control circuit; a temperature control section; and an arithmetic circuit, wherein the temperature control section includes a temperature-sensitive element, a heating element, and a temperature control circuit, the frequency voltage control circuit includes a voltage-controlled capacitance circuit capable of varying the capacitance value in accordance with the voltage, and a compensation voltage generation circuit, and the arithmetic circuit makes the compensation voltage generation circuit generate a voltage for compensating a frequency deviation due to a temperature difference between zero temperature coefficient temperature Tp of the piezoelectric vibrator and setting temperature Tov of the temperature control section based on a frequency-temperature characteristic compensation amount approximate formula adapted to compensate the frequency deviation, and then applies the voltage t
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: April 14, 2015
    Assignee: Seiko Epson Corporation
    Inventors: Jun Matsuoka, Tadayoshi Soga, Akitoshi Ogino, Yuichi Oinuma
  • Patent number: 9007139
    Abstract: According to one embodiment, a first oscillator has an oscillation frequency that is changed depending on a temperature. A second oscillator has different temperature characteristics from the first oscillator. An on-chip heater heats the first oscillator and the second oscillator. A counter counts a first oscillation signal of the first oscillator. An ADPLL generates a third oscillation signal on the basis of a second oscillation signal of the second oscillator and corrects the frequency of the third oscillation signal on the basis of a count value of the counter.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: April 14, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shouhei Kousai, Yuji Satoh, Hiroyuki Kobayashi
  • Patent number: 9007138
    Abstract: An oscillator that includes a first source current leg and first sink current leg to source current and sink current, respectively, during a startup mode of oscillator operation. The oscillator includes a second source current leg and a second sink current leg to source current and sink current, respectively, during a second mode of oscillator operation.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: April 14, 2015
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Gilles J. Muller, Jeffrey C. Cunningham, Karthik Ramanan
  • Patent number: 9000856
    Abstract: A method and device for calibrating an oscillator and a temperature sensor in an electronic device are provided. A same temperature cycle, which includes at least two distinct temperatures, may be used to obtain data to calibrate both the oscillator and the temperature sensor. One of the distinct temperatures may comprise an ambient temperature, and a second distinct temperature may comprise a heated temperature greater than the ambient temperature. The electronic device (or a calibration device separate from the electronic device) may receive the readings from the oscillator and the temperature sensor at the two distinct temperatures in the same temperature cycle, and may determine an oscillator correction factor and a temperature sensor correction factor.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: April 7, 2015
    Assignee: SanDisk Technologies Inc.
    Inventors: Deepak Pancholi, Bhavin Odedara
  • Patent number: 9000855
    Abstract: An oscillating frequency drift detecting method, which comprises: receiving an oscillating signal with an oscillating frequency, wherein the oscillating signal is generated by a crystal oscillator; generating a self-mixing signal according to the oscillating signal; obtaining a self-mixing frequency of a maximum power of the self-mixing signal in a specific frequency range; and computing a frequency drift of the oscillating frequency, according to the self-mixing frequency of the maximum power, and the oscillating frequency.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: April 7, 2015
    Assignee: Realtek Semiconductor Corp.
    Inventor: Ming-Chung Huang
  • Patent number: 8994428
    Abstract: A period signal generation circuit including a control voltage generator and a period controller. The control voltage generator selecting one of temperature-dependent voltages to output the selected temperature-dependent voltage as a control voltage. The first and second temperature-dependent voltages varying according to a temperature and the third temperature-dependent voltage is constant regardless of variation of the temperature. The period controller configured to determine an amount of a current discharging from an internal node in response to the control voltage and outputs a periodic signal whose cycle time is determined according to a level of an internal signal induced at the internal node.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: March 31, 2015
    Assignee: SK Hynix Inc.
    Inventor: Hyun Ju Ham
  • Patent number: 8994466
    Abstract: Methods, apparatuses, systems and computer-readable media for addressing the aging of oscillation (XO) crystals are presented. Some embodiments may determine a change of age of the XO crystal since last prior use of the XO crystal. Embodiments may then determine that at least one calibration parameter is not suitable for use in at least one calibration technique of the XO crystal, based on the change of age of the XO crystal. Embodiments may then determine at least one fresh calibration parameter configured to update the at least one calibration parameter for suitable use in the at least one calibration technique of the XO crystal.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 31, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Daniel Fred Filipovic, Sasidhar Movva, Vishal Agarwal, Dominic Gerard Farmer, Sridhar Bandaru
  • Patent number: 8975969
    Abstract: Disclosed are control systems, and more specifically control systems which benefit from a long-gate time for measurement and a rapid sample time to enhance responsiveness and methods and systems for utilizing multiple-staggered, overlapping gates where the gate time is an integer multiple of the time between ends of adjacent gates. The system continuously counts at the wavefronts or zero-crossings of a frequency reference signal and temporarily records them in registers and compares the contents of registers separated by a gate time and outputs a sample after every sample time.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: March 10, 2015
    Assignee: Rockwell Collins, Inc.
    Inventors: Michael C. Meholensky, Vadim Olen, Adrian A. Hill, Paul L. Opsahl