Transformer Coupled Patents (Class 330/195)
  • Patent number: 10186747
    Abstract: Embodiments are generally directed to a transformer based on-package power combiner. An embodiment of a power combiner includes multiple primary coils on a first metal layer of a package; a secondary coil on a second metal layer of the package, the secondary coil including multiple secondary coil portions, wherein each primary coil is located to be aligned with a respective one of the secondary coil portions; a trace on a third metal layer of the package; and multiple vias to connect the secondary coil portions to the trace on the third metal layer.
    Type: Grant
    Filed: October 1, 2016
    Date of Patent: January 22, 2019
    Assignee: Intel Corporation
    Inventor: Lei Feng
  • Patent number: 10033338
    Abstract: Certain aspects of the present disclosure generally relate to an amplifier configured to process signals received in different frequency bands, where at least a portion of the amplifier is shared between different modes corresponding to the different frequency bands. One example circuit generally includes an amplifier having at least one first transistor configured to amplify a first signal received in a first mode of operation (e.g., associated with a particular frequency band), and at least one second transistor configured to amplify a second signal received in a second mode of operation. The amplifier may also include a transformer comprising a primary winding and a secondary winding, and one or more switches configured to selectively couple the primary winding to the first transistor or the second transistor based on the first mode or the second mode of operation, respectively. In certain aspects, the transformer may be coupled to a transconductance circuit.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: July 24, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Konstantin Trotskovsky, Vipul Chawla
  • Patent number: 9667206
    Abstract: A novel and useful radio frequency (RF) front end module (FEM) circuit that provides high linearity and power efficiency and meets the requirements of modern wireless communication standards such as 802.11 WLAN, 3G and 4G cellular standards, Bluetooth, ZigBee, etc. The configuration of the FEM circuit permits the use of common, relatively low cost semiconductor fabrication techniques such as standard CMOS processes. The FEM circuit includes a power amplifier made up of one or more sub-amplifiers having high and low power circuits and whose outputs are combined to yield the total desired power gain. An integrated multi-tap transformer having primary and secondary windings arranged in a novel configuration provide efficient power combining and transfer to the antenna of the power generated by the individual sub-amplifiers.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: May 30, 2017
    Assignee: DSP GROUP Ltd.
    Inventors: Sergey Anderson, Alexander Mostov, Eli Schwartz, Ron Pongratz, Ilya Sima
  • Patent number: 9264038
    Abstract: A circuit for receiving digital signals over a transmission line. A feedback circuit is coupled to an input node of the transmission line and adjusts the input impedance of the receiver circuit to match the characteristic impedance of the transmission line. The feedback circuit includes a first current source controlled by a first voltage and having a first transconductance, and a second current source controlled by the first voltage and having a second transconductance equal to the first transconductance times a first scaling factor. The feedback circuit includes a first resistance element having a resistance equal to the first scaling factor plus one, times the characteristic impedance of the transmission line, and is coupled between the outputs of the first and second current sources.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: February 16, 2016
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Horia Giuroiu
  • Patent number: 9064627
    Abstract: The invention proposes a radio frequency circuit which comprises a transformer with a first primary circuit, a second primary circuit, and a secondary circuit, the secondary circuit comprising an integrated first inductor, this first inductor being positioned, on an axis orthogonal to a surface of the circuit, between an integrated second and third inductor respectively comprised in the first primary circuit and second primary circuit.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: June 23, 2015
    Assignees: ST-ERICSSON SA, ST-ERICSSON (FRANCE) SAS
    Inventors: Christophe Cordier, Thomas Francois, Olivier Tesson
  • Patent number: 8975961
    Abstract: Circuits for reducing power consumption in power amplifier circuits are disclosed. In certain embodiments, a circuit for power control in the transmitter includes a coupling circuit, a first power amplifier circuit and a second power amplifier circuit. The coupling circuit includes a primary winding inductively associated with a first secondary winding and a second secondary winding. The coupling circuit provides a signal at output terminals of the first secondary winding and the second secondary winding in response to a signal at the primary winding. A first power amplifier circuit is coupled with output terminals of the first secondary winding, and a second power amplifier is coupled with output terminals of the second secondary winding. The first power amplifier circuit and second power amplifier circuit are configured to be enabled or disabled based on a bias voltage.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: March 10, 2015
    Assignee: Texas Instruments Incorporated
    Inventors: Alok Prakash Joshi, Gireesh Rajendran
  • Patent number: 8952755
    Abstract: Disclosed herein is a circuit for preventing an element from being damaged although output impedance of a final transistor is changed in a power amplifier. The power amplifier includes: a power stage amplifying a signal; a transformer connected to an output terminal of the power stage and coupling a signal output from the power stage; and a controller controlling a bias voltage from the power stage according to the coupled signal. Although output impedance is changed, damage to the power amplifier can be prevented. Also, the power amplifier can be automatically controlled to maintain performance thereof by sensing an operational state in which output impedance is normal.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: February 10, 2015
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Yoo Hwan Kim, Yoo Sam Na, Hyeon Seok Hwang, Byeong Hak Jo, Hyun Hwan Yoo
  • Patent number: 8929945
    Abstract: Several multiband transceivers are disclosed. An exemplified multiband transceiver supporting different bands has a transformer, an inbound switch circuit, and an outbound switch circuit. The transformer has input ports on a primary side, and output ports on a secondary side. The input ports are direct-current isolated from and magnetically coupled to the output ports. The inbound switch circuit is configured to connect one of the input ports with an RF signal source for signal transmission. The outbound switch circuit is configured to connect one of the output ports with a RF output load. Optionally, an input tunable capacitor is configured to shunt with the effective inductance of one of the input ports and form a LC tank for band selection.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: January 6, 2015
    Assignee: MStar Semiconductor, Inc.
    Inventors: Hung-Ju Wei, Bo-Jiun Chen, Chih-Ming Hung
  • Patent number: 8928405
    Abstract: A circuit for amplifying the power of signal, the circuit comprising a power amplifier, a transformer and a load; wherein the transformer comprises a primary inductor and a secondary inductor, the first inductor being coupled to, and capable of being driven by, the power amplifier, and the secondary inductor coupled to, and capable of driving, the load; wherein a first one of the primary and secondary inductors is a variable inductor whose inductance is variable responsive to a control input in order to change the output power of the amplifier.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: January 6, 2015
    Assignee: Cambridge Silicon Radio Limited
    Inventors: Giuseppe Gramegna, Konstantinos Manetakis
  • Patent number: 8918064
    Abstract: A transmitter front-end for wireless chip-to-chip communication, and potentially for other, longer range (e.g., several meters or several tens of meters) device-to-device communication, is disclosed. The transmitter front-end includes a distributed power amplifier capable of providing an output signal with sufficient power for wireless transmission by an on-chip or on-package antenna to another nearby IC chip or device located several meters or several tens of meters away. The distributed power amplifier can be fully integrated (i.e., without using external components, such as bond wire inductors) on a monolithic silicon substrate using, for example, a complementary metal oxide semiconductor (CMOS) process.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: December 23, 2014
    Assignee: Broadcom Corporation
    Inventors: Farid Shirinfar, Med Nariman, Maryam Rofougaran, Ahmadreza Rofougaran
  • Patent number: 8897379
    Abstract: A digital communication system comprising a host and a client, the host calls the client via two transmission lines. The host includes a processor, a first control unit, a second control unit, a high frequency transformer and an interface unit. The digital communication system utilizes the first control unit and the high frequency transformer to modulate outgoing signals. The digital communication system utilizes the second unit and the high frequency transformer to demodulate incoming signals.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: November 25, 2014
    Assignees: Fu Tai Hua Industry (Shenzhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Ren-Wen Huang, Yang Xin, Qiang You, Chong-Jin Ma, Tsung-Jen Chuang
  • Patent number: 8823449
    Abstract: An Extremely High Frequency (EHF) dual-mode PA with a power combiner is designed using 40-nm bulk CMOS technology. One of the unit PAs can be switched off for the low power applications. In the design, circuit level optimization and trade-off are performed to ensure the good performance in both modes. The PA achieves a PSAT of 17.4 dBm with 29.3% PAE in high power mode and a PSAT of 12.6 dBm with 19.6% PAE in low power mode. The reliability measurements are also conducted and a lifetime of 80613 hours is estimated based on a commonly used empirical model. The excellent performance (e.g., highest reported PAE) achieved in this design further confirms the scaling of CMOS technology will continue to benefit the mm-wave transceiver design.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: September 2, 2014
    Assignee: ST-Ericsson SA
    Inventors: Joos Dieter, Wim Philibert, Patrick Reynaert, Dixian Zhao
  • Patent number: 8786372
    Abstract: This application reduces the power of series combined transformers and of parallel combined transformers while maintaining efficiency. In one embodiment, a series combined transformer is provided with a switch between a first primary inductor and a second primary inductor, in order to provide at least two modes. In a high power mode, the switch is open and the series combined transformer operates normally. In a low power mode, the switch is closed, one amplifier from a first differential amplifier pair is shut down, one amplifier from a second differential pair is shut down, and the series combined transformer operates efficiently in a low power mode.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: July 22, 2014
    Assignee: RF Micro Devices, Inc.
    Inventors: Wayne D. Tattershall, David E. Jones
  • Patent number: 8760228
    Abstract: Embodiments of the present disclosure relate to radio frequency (RF) transmitter circuitry, which includes non-inverting path power amplifier (PA) circuitry, inverting path PA circuitry, and RF transformer circuitry. The non-inverting path PA circuitry provides a non-inverting RF signal and a first power supply (PS) signal to the RF transformer circuitry, such that the first PS signal has a first ripple voltage. The inverting path PA circuitry provides an inverting RF signal and a second PS signal to the RF transformer circuitry, such that the second PS signal has a second ripple voltage. The RF transformer circuitry additively combines the non-inverting RF signal and the inverting RF signal to provide an RF output signal, such that effects of the first ripple voltage and the second ripple voltage are substantially cancelled from the RF output signal.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: June 24, 2014
    Assignee: RF Micro Devices, Inc.
    Inventor: Nadim Khlat
  • Patent number: 8755539
    Abstract: An electrostatic transducer loudspeaker includes a filterless class-D amplifier to modulate an audio input signal to generate a modulated signal containing a PWM switching carrier component, and a transformer directly connected at an output side of the filterless class-D amplifier and directly connected at an input side of an electrostatic transducer, whereby the equivalent capacitance of the electrostatic transducer and the equivalent inductance of the transformer establish a resonance circuit to demodulate the modulated signal to generate an AC voltage to drive the electrostatic transducer.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: June 17, 2014
    Assignee: Richtek Technology Corp.
    Inventors: Pei-Cheng Huang, Jwin-Yen Guo
  • Patent number: 8729963
    Abstract: An asymmetrical transformer output demultiplexing (ATODEM) circuit is disclosed. The ATODEM circuit of the present disclosure includes N input windings, wherein N is a natural number. Each of the N input windings have input terminals that couple to output terminals of N PAs. The ATODEM further includes M output ports wherein M is a natural number, each of the M output ports having N series coupled windings coupled between a load terminal and a return terminal. The physical attributes of the N input windings, and the N series coupled windings of the M output ports are asymmetrical such that in an Nth operation mode an Nth PA first-load line impedance matches an output impedance of an Nth PA coupled to the input terminals.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: May 20, 2014
    Assignee: RF Micro Devices, Inc.
    Inventors: Jeppe Korshøj Bendixen, Ruediger Bauder
  • Patent number: 8687369
    Abstract: An apparatus configured to create a resistive pathway for an electronic assembly is disclosed. In one embodiment, the pathway can be formed with a resistive film in conjunction with a conductive adhesive and a coverlay. In another embodiment, the resistive film, the conductive adhesive and the coverlay can be relatively transparent. In yet another embodiment, the resistive pathway can couple directly with traces on an electronic assembly saving space and easing assembly.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: April 1, 2014
    Assignee: Apple Inc.
    Inventors: David A. Stronks, Ahmad Al-Dahle, Wei H. Yao
  • Patent number: 8666340
    Abstract: Methods and systems for on-chip impedance control to impedance match a configurable front end are disclosed and may include selectively enabling one or more amplifiers coupled to taps on a multi-tap transformer in a chip including the amplifiers. The impedances of the amplifiers may be matched to impedances of the taps on the transformer. The amplifiers may include low noise amplifiers wherein the input impedance of each of the low noise amplifiers may be different. The amplifiers may include power amplifiers wherein an output impedance of each of the power amplifiers may be different. The transformer may be coupled to an on-chip antenna, or to an antenna integrated on a package coupled to the chip. The multi-tap transformer may be integrated on the package. RF signals may be communicated via the selectively enabled amplifiers and the multi-tap transformer. The multi-tap transformer may include ferromagnetic materials integrated in the chip.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: March 4, 2014
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8604874
    Abstract: An asymmetrical transformer output demultiplexing (ATODEM) circuit is disclosed. The ATODEM circuit of the present disclosure includes N input windings, wherein N is a natural number. Each of the N input windings have input terminals that couple to output terminals of N PAs. The ATODEM further includes M output ports wherein M is a natural number, each of the M output ports having N series coupled windings coupled between a load terminal and a return terminal. The physical attributes of the N input windings, and the N series coupled windings of the M output ports are asymmetrical such that in an Nth operation mode an Nth PA first-load line impedance matches an output impedance of an Nth PA coupled to the input terminals.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: December 10, 2013
    Assignee: RF Micro Devices, Inc.
    Inventor: Jeppe Korshøj Bendixen
  • Patent number: 8508301
    Abstract: A three dimensional on-chip radio frequency amplifier is disclosed that includes first and second transformers and a first transistor. The first transformer includes first and second inductively coupled inductors. The second transformer includes third and fourth inductively coupled inductors. Each inductor includes multiple first segments in a first metal layer; multiple second segments in a second metal layer; first and second inputs, and multiple through vias coupling the first and second segments to form a continuous path between the first and second inputs. The first input of the first inductor is coupled to an amplifier input; the first input of the second inductor is coupled to the first transistor gate; the first input of the third inductor is coupled to the first transistor drain, the first input of the fourth inductor is coupled to an amplifier output. The second inductor inputs and the first transistor source are coupled to ground.
    Type: Grant
    Filed: November 11, 2011
    Date of Patent: August 13, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Jonghae Kim, Shiqun Gu, Brian Matthew Henderson, Thomas R. Toms, Lew G. Chua-Eoan, Seyfollah S. Bazarjani, Matthew Nowak
  • Patent number: 8502598
    Abstract: A digitally configurable transformer that performs switched transformer combining is disclosed. The flexible transformer includes switches that are dynamically configurable to efficiently combine RF power from power amplifier cores to achieve different power levels. The disclosed transformer is efficient at a broad range of power levels, leading to high power output efficiency. The transformer may be part of any power amplifier design that uses the transformer for power combining.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: August 6, 2013
    Assignee: Intel Corporation
    Inventors: Parmoon Seddighrad, Hongtao Xu, Georgios Palaskas
  • Patent number: 8446217
    Abstract: An amplifying circuit arranged for converting an input signal into an amplified output signal comprising: an input node (11) at an input side of said circuit for receiving said input signal (pi); an output node (9) at an output side of said circuit for outputting said amplified output signal (io); a first gain element (M1) connected between said input and output nodes and provided for converting an input voltage taken from said input signal into a current for forming said amplified output signal; a negative feedback loop (3) over said first gain element, said negative feedback loop having first elements (5, 6) arranged for providing input matching; and a positive feedback loop (2) over said first gain element, said positive feedback loop having second elements (7, 8) arranged for providing additional input matching and gain enhancement of said first gain element.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: May 21, 2013
    Assignee: IMEC
    Inventor: Sumit Bagga
  • Patent number: 8384484
    Abstract: An amplifier output impedance matching configuration including a first impedance transformer and one or more second impedance transformers. The first impedance transformer receives input signals from a power amplifier and generates output signals to a load. The one or more second impedance transformers are connected between the first impedance transformer and the load through which the output signals are passed.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: February 26, 2013
    Assignee: M/A-COM Technology Solutions Holdings, Inc.
    Inventor: Thomas A. Winslow
  • Patent number: 8378744
    Abstract: There is provided a multi-mode power amplifier operable in a low power mode having a preset power range and in a high power mode having a power range higher than the power range of the low power mode. The multi-mode power amplifier includes: a high power amplifying unit including at least one cascode amplifier to amplify an input signal to a high power level having a preset power range; a low power amplifying unit sharing a common source node of the at least one cascode amplifier to amplify the input signal to a low power level having a power range lower than the high power level; and a coupling unit coupling a transfer path of a signal output from the high power amplifying unit and a transfer path of a signal output from the low power amplifying unit to each other.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: February 19, 2013
    Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Bon Hoon Koo, Byeong Hak Jo, Ki Yong Son, Yoo Sam Na, Song Cheol Hong
  • Patent number: 8362835
    Abstract: A wide bandwidth planar four port MMIC transformer is provided by input diplexers which divide up the incoming signal into a high band and a low band, with the resulting signals coupled to high band and low band four port transformers implemented in one embodiment using spiral inductors and coupled lines, the outputs of which are combined using two output diplexers to provide a decade bandwidth transformer.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: January 29, 2013
    Assignee: Gradual Tech Software L.L.C.
    Inventor: David E. Meharry
  • Publication number: 20120242406
    Abstract: A signal transforming circuit includes: a first substantially 8-shaped geometry primary winding arranged to couple a first input signal; and a substantially 8-shaped geometry secondary winding having a first port and a second port, the substantially 8-shaped geometry secondary winding disposed adjacent to the first substantially 8-shaped geometry primary winding to magnetically couple to the first substantially 8-shaped geometry primary winding for generating an output signal at the first port and the second port.
    Type: Application
    Filed: March 21, 2011
    Publication date: September 27, 2012
    Inventor: Ling-Wei Ke
  • Patent number: 8253486
    Abstract: There is provided a wireless apparatus having a shielding function for shielding signal interference between driving power from a power amplifier and a conductive wire of a coupler. The wireless apparatus having a shielding function, includes an amplifying unit receiving preset driving power and amplifying a radio frequency (RF) input signal according to a preset gain, an impedance matching unit including at least one coil, receiving the driving power from the amplifying unit, and matching the impedance of a path of a signal, amplified from the amplifying unit, through the coil, and a shielding unit eliminating signal interference between the coil and a transmission path of the driving power from the amplifying unit.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: August 28, 2012
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Ki Joong Kim, Tae Joon Park, Young Jean Song, Jun Goo Won, Youn Suk Kim
  • Publication number: 20120147707
    Abstract: A method of optimizing a parametric emitter system having a pot core transformer coupled between an amplifier and an emitter, the method comprising: selecting a number of turns required in a primary winding of the pot core transformer to achieve an optimal level of load impedance experienced by the amplifier; and selecting a number of turns required in a secondary winding of the pot core transformer to achieve electrical resonance between the secondary winding and the emitter.
    Type: Application
    Filed: June 14, 2011
    Publication date: June 14, 2012
    Inventor: Elwood G. Norris
  • Patent number: 8188788
    Abstract: Systems and methods are provided for discrete resizing of power devices. The systems and methods can include a plurality of unit power amplifiers arranged in parallel, where each unit power amplifier includes at least one first input port, at least one first output port, and a plurality of sub-power-device cells configured in parallel between the at least one first input port and the at least one first output port; a switch controller, where the controller is operative to activate or deactivate at least one of the plurality of sub-power-device cells of a respective unit power amplifier; and an output matching network, where the matching network is configured to combine respective outputs from the respective plurality of unit power amplifiers to generate a system output, wherein during an operational state, all of the plurality of unit power amplifiers contribute outputs to the matching network to generate the system output.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: May 29, 2012
    Assignee: Samsung Electro-Mechanics
    Inventor: Chang-Ho Lee
  • Publication number: 20120112835
    Abstract: An amplifier having an input transmission network with a plurality of input transformers having serially coupled primary windings. Each one of the input transformers has a secondary winding magnetically coupled to a corresponding one of the primary windings. The amplifier includes an output transmission network having a plurality of output transformers having serially coupled secondary windings. Each one of the output transformers has a secondary winding magnetically coupled to a corresponding one of the primary windings. The amplifier includes a plurality of amplifier sections, each one the sections having an input connected to a corresponding one of the secondary windings of the input transformers and an output connected to a corresponding one of the primary windings of the output transformers.
    Type: Application
    Filed: November 9, 2010
    Publication date: May 10, 2012
    Applicant: Raytheon Company
    Inventors: Jonathan P. Comeau, Matthew A. Morton, Edward W. Thoenes
  • Patent number: 8174323
    Abstract: A high frequency amplifier includes a package substrate, an amplifying active device disposed on a top surface of the package substrate, a transmission line connected to the amplifying active device and transmitting a high frequency signal, a surface mounted device (SMD) component shunt-connected at a first end to the transmission line, a SMD component terminal connected to a second end of the SMD component and partially exposed at a back surface of the package substrate, and an external terminal partially exposed at the back surface of the package substrate and connected to a first end of the transmission line, opposite a second end of the transmission line that is connected to the amplifying active device.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: May 8, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventor: Toshio Okuda
  • Patent number: 8174315
    Abstract: According to an embodiment, a method is provided that includes: adapting the impedance of the load dependent on working conditions of the active device using a controllable output-side adaptation network coupled between an output-side terminal of a transformer and an output-side node, to generate an adapted impedance of the load, adjusting the adapted impedance independent of the working conditions of the active device, using the transformer including a first inductor having a first terminal to receive the output of the active device via the input-side node, a second inductor having an output-side terminal, where the second inductor is magnetically coupled to the first inductor.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: May 8, 2012
    Assignee: TriQuint Semiconductor, Inc.
    Inventors: Tobias Mangold, Andreas Weisgerber
  • Patent number: 8154344
    Abstract: A reduction is achieved in the primary-side input impedance of a transformer (voltage transformer) as an output matching circuit without involving a reduction in Q-factor. An RF power amplifier includes transistors, and a transformer as the output matching circuit. The transformer has a primary coil and a secondary coil which are magnetically coupled to each other. To the input terminals of the transistors, respective input signals are supplied. The primary coil is coupled to each of the output terminals of the transistors. From the secondary coil, an output signal is generated. The primary coil includes a first coil and a second coil which are coupled in parallel between the respective output terminals of the transistors, and each magnetically coupled to the secondary coil. By the parallel coupling of the first and second coils of the primary coil, the input impedance of the primary coil is reduced.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: April 10, 2012
    Assignee: Renesas Electronics Corporation
    Inventors: Masao Kondo, Yoshikuni Matsunaga, Kenta Seki, Satoshi Sakurai
  • Publication number: 20120038420
    Abstract: There is provided a communications circuit for reducing crosstalk.
    Type: Application
    Filed: July 7, 2011
    Publication date: February 16, 2012
    Inventors: Jun Goo WON, Youn Suk KIM, Ki Joong KIM, Jae Hyouck CHOI, Young Jean SONG
  • Patent number: 8115555
    Abstract: Systems and methods are provided for a transformer or balun function with reference enhancement. The systems and methods may include a transformer having at least a primary winding and a secondary winding for reference enhancement, where the primary winding includes a center tap, where the secondary winding includes a first port and a second port, and an electrical connection that electrically connects the second port and the center tap of the primary winding to provide a common reference for the primary winding and the secondary winding. The primary winding of the transformer may be configured to receive differential outputs of a power amplifier, and the transformer may be configured to convert the differential outputs from a balanced signal to an unbalanced signal available at the first port of the secondary winding.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: February 14, 2012
    Assignee: Samsung Electro-Mechanics
    Inventors: Kyu Hwan An, Yunseo Park, Chang-Ho Lee
  • Patent number: 8116700
    Abstract: In one embodiment, a power amplifier may include an output stage with multiple transformers and corresponding matching capacitances. The capacitances may include a first matching capacitance coupled in parallel with a secondary coil of a first transformer and a second matching capacitance coupled in parallel with a secondary coil of a second transformer, where the secondary coils are coupled in series in an output stack configuration. By accounting for parasitics present in the power amplifier, the first matching capacitance can be designed to have a greater capacitance than the second matching capacitor, even where the first and second transformers are configured to output substantially equal power levels.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: February 14, 2012
    Assignee: Javelin Semiconductor, Inc.
    Inventor: Eric Kimball
  • Patent number: 8098095
    Abstract: Disclosed herein is a power amplifier. The power amplifier includes N power amplification means, a transformer, and a harmonic elimination unit. Each of the N power amplification means amplifies an input signal into a predetermined level. The transformer includes N/2 primary windings respectively connected to the output terminals of the power amplification means and a secondary winding configured such that coil elements are connected in series between an output terminal and a ground, and sums power transmitted from the primary windings. The harmonic elimination unit is disposed across both ends of the secondary winding of the transformer, and eliminates the output of the harmonic frequencies of a preset frequency.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: January 17, 2012
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Joong Jin Nam, Youn Suk Kim, Hyo Gun Bae, Jae Hyouck Choi, Jun Goo Won, Young Jean Song, Ki Joong Kim, Sang Hee Kim
  • Patent number: 8093950
    Abstract: A power amplifier amplifying and compositing differential signals and capable of suppressing harmonics is provided. The power amplifier includes first amplifiers amplifying a first input signal and a second input signal, which are differential signals, a first coil receiving the first input signal and the second input signal amplified by the first amplifiers, a second coil magnetically coupled with the first coil and outputting a composite signal of the amplified first input signal and second input signal, a third coil magnetically coupled with the second coil, and a first capacitor coupled between both ends of the third coil, wherein one end of the first capacitor is coupled to a ground node.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: January 10, 2012
    Assignee: Renesas Electronics Corporation
    Inventors: Akihiko Furukawa, Tsuyoshi Kawakami, Yasuhiro Kagawa, Satoshi Yamakawa
  • Publication number: 20110309205
    Abstract: There is provided a track current suppression device. An exemplary device includes an input coupled between rails of a railway track and configured to receive an input voltage corresponding to a track current. The exemplary device also includes an amplifier configured to receive the input voltage and generate a cancellation current. The exemplary device also includes an output coupled between the rails of the railway track and configured to deliver the cancellation current to the rails with reversed polarity compared to the track current.
    Type: Application
    Filed: June 18, 2010
    Publication date: December 22, 2011
    Inventors: Larry J. Anderson, Forrest H. Ballinger
  • Publication number: 20110304391
    Abstract: A wide bandwidth planar four port MMIC transformer is provided by input diplexers which divide up the incoming signal into a high band and a low band, with the resulting signals coupled to high band and low band four port transformers implemented in one embodiment using spiral inductors and coupled lines, the outputs of which are combined using two output diplexers to provide a decade bandwidth transformer.
    Type: Application
    Filed: August 22, 2011
    Publication date: December 15, 2011
    Applicant: BAE Systems Information and Electronic Systems Integration Inc.
    Inventor: David E. MEHARRY
  • Publication number: 20110298539
    Abstract: A radio frequency (RF) power amplifier system adjusts the supply voltage provided to a power amplifier (PA) adaptively, responsive to the measured or estimated power of the RF output signal of the PA. The RF PA system includes a power amplifier (PA) which receives and amplifies an RF input signal to generate an RF output signal at a level suitable for transmission to an antenna. A PA supply voltage controller generates a supply voltage control signal, which is used to control the supply voltage to the final stage of the PA. The supply voltage control signal is generated responsive to the measured or estimated power of the PA RF output signal, and also may be responsive to a parameter indicative of impedance mismatch experienced at the PA output. By controlling this supply voltage to the RF PA, the efficiency of the PA is improved.
    Type: Application
    Filed: June 4, 2010
    Publication date: December 8, 2011
    Applicant: QUANTANCE, INC.
    Inventors: Serge Francois Drogi, Martin Tomasz
  • Patent number: 8044540
    Abstract: A SPDT or SPMT switch may include a transformer having a primary winding and a secondary winding, where a first end of the secondary winding is connected to a single pole port, where a first end of the primary winding is connected to a first throw port; a first switch having a first end and a second end, where the first end is connected to ground; and a second switch, where a second end of the secondary winding is connected to both a second end of the first switch and a first end of the second switch, where a second end of the second switch is connected to a second throw port, where the first switch controls a first communication path between the single pole port and the first throw port, and where the second switch controls a second communication path between the second throw port and the single pole port.
    Type: Grant
    Filed: September 23, 2009
    Date of Patent: October 25, 2011
    Assignees: Georgia Tech Research Corporation, Samsung Electro-Mechanics
    Inventors: Dong Ho Lee, Minsik Ahn, Kyu Hwan An, Wangmyong Woo, Chang-Ho Lee, Joy Laskar
  • Patent number: 8026765
    Abstract: An amplifier is operable in push-pull mode, single-ended mode, or a composite mode that is an intermediate between single-ended and Push-pull modes. Moreover, at least one output device may be configured to operate using a high performance AC servo loop that functions the output device as a current source. Still further, a control input driver stage is provided that is capable of supplying sufficient AC current to overcome Miller capacitance induced roll off within the intended frequency spectrum of triode vacuum tubes. Additionally, methods are provided to substantially null or selectively introduce DC magnetic bias within the output transformer core. Still further, a solid state power supply stage provides substantial AC hum reduction during single-ended operation and simultaneously provides output voltage load regulation attributes similar to traditional vacuum tube rectifier circuits.
    Type: Grant
    Filed: April 11, 2010
    Date of Patent: September 27, 2011
    Inventor: Roberto Michele Giovannotto
  • Publication number: 20110204976
    Abstract: An impedance transformer includes a first transmission line having a first impedance and provided over a first substrate having a first permittivity; a second transmission line and a third transmission line having an impedance lower than the first impedance and provided over a second substrate having a permittivity higher than the first permittivity, the second transmission line and the third transmission line being electrically coupled to the first transmission line; and a resistor coupled between the second transmission line and the third transmission line.
    Type: Application
    Filed: February 15, 2011
    Publication date: August 25, 2011
    Applicant: Fujitsu Limited
    Inventor: Satoshi MASUDA
  • Publication number: 20110140781
    Abstract: Disclosed are an impedance matching circuit preventing the occurrence of inter-line interference by making currents at adjacent lines flow in the same direction, and a power amplifier having the same.
    Type: Application
    Filed: June 29, 2010
    Publication date: June 16, 2011
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Youn Suk KIM, Shinichi IIZUKA, Hyo Gun BAE, Sang Hee KIM, Ki Joong KIM
  • Publication number: 20110121898
    Abstract: There is provided a wireless apparatus having a shielding function for shielding signal interference between driving power from a power amplifier and a conductive wire of a coupler. The wireless apparatus having a shielding function, includes an amplifying unit receiving preset driving power and amplifying a radio frequency (RF) input signal according to a preset gain, an impedance matching unit including at least one coil, receiving the driving power from the amplifying unit, and matching the impedance of a path of a signal, amplified from the amplifying unit, through the coil, and a shielding unit eliminating signal interference between the coil and a transmission path of the driving power from the amplifying unit.
    Type: Application
    Filed: May 28, 2010
    Publication date: May 26, 2011
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Ki Joong KIM, Tae Joon PARK, Young Jean SONG, Jun Goo WON, Youn Suk KIM
  • Patent number: 7944296
    Abstract: A power amplifier system in accordance with an example embodiment can utilize a transformer having a primary winding inductively coupled to a secondary winding, where the primary winding includes a center tap between a first port and a second port, where the secondary winding includes a third port and a fourth port, where the primary winding receives a first output from a first amplifier, where the center tap receives a second output from a second amplifier.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: May 17, 2011
    Assignee: Samsung Electro-Mechanics Company
    Inventors: Chang-Ho Lee, Kyu Hwan An, Yunseo Park
  • Patent number: 7936215
    Abstract: Embodiments of the invention may provide for power amplifier systems and methods. The systems and methods may include a power amplifier that generates a first differential output signal and a second differential output signal, a primary winding comprised of a plurality of primary segments, where a first end of each primary segment is connected to a first common input port and a second end of each primary segment is connected to a second common input port, where the first common input port is operative to receive the first differential output signal, and where the second common input port is operative to receive the second differential output signal, and a single secondary winding inductively coupled to the plurality of primary segments.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: May 3, 2011
    Assignees: Samsung-Electro Mechanics, Georgia Tech Research Corporation
    Inventors: Chang-Ho Lee, Ockgoo Lee, Jeonghu Han, Kyu Hwan An, Hyungwook Kim, Dong Ho Lee, Ki Seok Yang, Haksun Kim, Joy Laskar
  • Patent number: 7880547
    Abstract: Systems and methods may be provided for a power amplifier system. The systems and methods may include a plurality of power amplifiers, where each power amplifier includes at least one output port. The systems and methods may also include a plurality of primary windings each having a first number of turns, where each primary winding is connected to at least one output port of the plurality of power amplifiers, and a single secondary winding inductively coupled to the plurality of primary windings, where the secondary winding includes a second number of turns greater than the first number of turns.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: February 1, 2011
    Assignees: Samsung Electro-Mechanics, Georgia Tech Research Corporation
    Inventors: Chang-Ho Lee, Kyu Hwan An, Ki Seok Yang, Jaejoon Chang, Wangmyong Woo, Younsuk Kim, Haksun Kim, Ockgoo Lee, Dong Ho Lee, Hyungwook Kim, Joy Laskar
  • Patent number: 7872529
    Abstract: In accordance with one the present disclosure, systems and methods are disclosed that include transmitting a binary signal from a signal source into a switch where the switch is in series between the signal source and a first circuit element. In addition, the switch is operating substantially in a switched mode and creates a switched output signal and the switch is controlled by the binary signal. Also disclosed in this method is detecting a negative voltage in a signal from a second circuit element. In this method the first circuit element is in series between the second circuit element and the switch, and upon detecting the negative voltage from the second circuit element the first circuit element creates high impedance in the first circuit element.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: January 18, 2011
    Assignee: Nortel Networks Limited
    Inventor: Adrian Bergsma