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1.发明公开公开(公告)号：US20240364286A1
公开(公告)日：2024-10-31
申请号：US18601477
申请日：2024-03-11
Applicant: REALTEK SEMICONDUCTOR CORPORATION
Inventor： CHUNG-YU LIN
IPC: H03F3/45
CPC classification number: H03F3/45215 , H03F3/45475 , H03F2203/45288
Abstract: An amplifying circuit allows its loading circuit to contribute a transconductance to increase the bandwidth of the amplifying circuit, and thereby achieves common-mode stabilization. The amplifying circuit includes a first and a second amplifying circuit. The first amplifying circuit is coupled between a high-voltage terminal and a low-voltage terminal, and outputs a first amplified signal according to an input signal. The second amplifying circuit includes: an input-stage circuit configured to receive the input signal and output an input-stage output signal to intermediate nodes; a transconductance and loading circuit coupled between the high-voltage terminal and the input-stage circuit, and configured to output a transconductance-enhancement signal to the intermediate nodes according to the first amplified signal; and an output-stage circuit coupled between the high-voltage terminal and the low-voltage terminal and coupled to the intermediate nodes, and configured to output an output signal according to the input-stage output signal and the transconductance-enhancement signal.
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2.发明申请公开(公告)号：US20190229689A1
公开(公告)日：2019-07-25
申请号：US16372164
申请日：2019-04-01
Applicant: Luxtera, Inc.
Inventor： Brian Welch
CPC classification number: H03F3/45237 , G01J1/44 , H03F1/34 , H03F3/087 , H03F3/45071 , H03F3/45076 , H03F3/45475 , H03F3/45968 , H03F2200/405 , H03F2203/45222 , H03F2203/45288 , H03F2203/45511 , H03F2203/45526
Abstract: A system for a differential trans-impedance amplifier circuit comprising: an amplifier having a pair of input nodes and configured to generate an amplified replica of a differential voltage on said pair of input nodes; a photodiode; a pair of capacitors coupling said photodiode to said pair of input nodes; at least one resistance coupled between said pair of input nodes of said amplifier; and a bias network comprising two photodiode biasing resistances each photodiode biasing resistance coupled in series between said photodiode and a respective DC voltage. A feedback loop for the amplifier may include source followers that are operable to level shift voltages prior to coupling capacitors that couple said photodiode to said amplifier to ensure stable bias conditions for said amplifier. The source followers may include CMOS transistors. The amplifier may be integrated in a complementary metal-oxide semiconductor (CMOS) chip, which may include a CMOS photonics chip.
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公开(公告)号：US10084414B2
公开(公告)日：2018-09-25
申请号：US15021620
申请日：2014-09-15
Applicant: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK , Baradwaj Vigraham , Jayanth Kuppambatti , Peter R. Kinget
Inventor： Baradwaj Vigraham , Jayanth Kuppambatti , Peter R. Kinget
CPC classification number: H03F1/26 , H03F3/217 , H03F3/2173 , H03F3/45636 , H03F2200/264 , H03F2200/351 , H03F2203/45288 , H03K3/017 , H03K3/037 , H03K5/24
Abstract: Circuits and methods for switched mode operational amplifiers are provided. In some embodiments, circuits are provided, the circuits comprising: an amplifier having an output; a first pulse width modulator (PWM) having an input coupled to the output of the amplifier and using a first periodic reference signal waveform; and a second PWM having an input coupled to the output of the amplifier and using a second periodic reference signal waveform, wherein the second periodic reference signal waveform is 180 degrees out of phase from the first periodic reference signal waveform. In some embodiments, circuits are provided, the circuits comprising: an amplifier having an output; and a plurality of pulse width modulators (PWMs) each having an input coupled to the output of the amplifier and using a corresponding unique one of a plurality of periodic reference signal waveforms, wherein the plurality of periodic reference signal waveforms are shifted in phase.
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公开(公告)号：US20180191319A1
公开(公告)日：2018-07-05
申请号：US15395073
申请日：2016-12-30
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Vadim Valerievich IVANOV , Srinivas K. PULIJALA
IPC: H03F3/45
CPC classification number: H03F3/45475 , H03F1/3211 , H03F3/45 , H03F3/45071 , H03F3/45174 , H03F3/45183 , H03F3/45286 , H03F3/45932 , H03F2200/456 , H03F2200/462 , H03F2203/45288 , H03F2203/45528
Abstract: At least some embodiments are directed to a system that comprises a differential input transistor pair (DITP) comprising first and second transistors, a first feedback loop coupled to the first transistor, and a second feedback loop coupled to the second transistor. When a differential voltage applied to the input stage is within a first range, the first and second feedback loops control a tail current supplied to the DITP, where the tail current at least partially determines a transconductance of the DITP. When the differential voltage is within a second range, the transconductance of the DITP is at least partially determined by a first resistor in the first feedback loop or by a second resistor in the second feedback loop.
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公开(公告)号：US20180131342A1
公开(公告)日：2018-05-10
申请号：US15587579
申请日：2017-05-05
Applicant: STMicroelectronics S.r.l.
Inventor： Marco Zamprogno , Maurizio Bongiorni , Pasquale Flora
CPC classification number: H03G3/30 , H02J7/0063 , H02J7/345 , H03F3/087 , H03F3/45475 , H03F3/45973 , H03F3/45977 , H03F2203/45021 , H03F2203/45114 , H03F2203/45116 , H03F2203/45212 , H03F2203/45288 , H03F2203/45528 , H03F2203/45536 , H04B10/6933
Abstract: A transimpedance amplifier circuit includes a feedback control loop that generates a compensation current at an input of a transimpedance amplifier. The feedback control loop includes a differential integrator with an integration capacitor. A time constant associated with charging the integration capacitor is variable as a function of a pre-charge control signal. During a pre-charge phase, the pre-charge control signal is set to a first value so as to set the time constant associated with charging the integration capacitor to a first time constant value. During an operation phase, the pre-charge control signal is set to a second value so as to increase the time constant associated with charging the integration capacitor to a second time constant value greater than the first time constant value for the pre-charge phase.
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Patent Agency Ranking
公开(公告)号：US20180102768A1
公开(公告)日：2018-04-12
申请号：US15837299
申请日：2017-12-11
Applicant: OLYMPUS CORPORATION
Inventor： Yasunari Harada , Masato Osawa , Hideki Kato
CPC classification number: H03K5/08 , H03F3/45 , H03F3/45188 , H03F3/45475 , H03F3/45659 , H03F2203/45288 , H03F2203/45424 , H03F2203/45514 , H03F2203/45551 , H03M1/1014 , H03M1/1061 , H03M1/468 , H04N5/374 , H04N5/378
Abstract: A semiconductor device is provided that includes an amplification circuit, a downstream circuit, and a clipping circuit. The amplification circuit includes a sampling capacitor, a feedback capacitor, and an operational amplifier circuit. The sampling capacitor holds air input signal on which sampling is performed, as a signal whose reference is a first reference voltage. The signal that is held in the sampling capacitor is transferred to the feedback capacitor. The operational amplifier circuit amplifies the signal that is held in the sampling capacitor, according to a ratio between values of the sampling capacitor and the feedback capacitor, and outputs the amplified signal, as a signal whose reference is a second reference voltage. The clipping circuit limits a voltage of an output signal of the operational amplifier circuit to a predetermined voltage or below.
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公开(公告)号：US20170366146A1
公开(公告)日：2017-12-21
申请号：US15185825
申请日：2016-06-17
Applicant: QUALCOMM Incorporated
Inventor： Konstantin TROTSKOVSKY , Vipul CHAWLA
CPC classification number: H03F3/2171 , H03F1/223 , H03F3/005 , H03F3/195 , H03F3/217 , H03F3/2173 , H03F3/45475 , H03F2200/294 , H03F2200/333 , H03F2200/451 , H03F2200/541 , H03F2203/45228 , H03F2203/45288 , H04B1/04 , H04W84/04
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.
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公开(公告)号：US20170331440A1
公开(公告)日：2017-11-16
申请号：US15153915
申请日：2016-05-13
Applicant: MKS Instruments, Inc.
Inventor： Douglas C. Hansen
CPC classification number: H03F3/45 , G01R19/0061 , H03F1/083 , H03F1/3211 , H03F1/34 , H03F3/45475 , H03F2200/153 , H03F2200/261 , H03F2200/462 , H03F2203/45138 , H03F2203/45161 , H03F2203/45288 , H03F2203/45528
Abstract: A wide dynamic range trans-impedance amplifier includes a first trans-impedance amplifier configured to receive a first input current and produce a first voltage as a function of the first input current, and a second trans-impedance amplifier configured to receive a second input current and produce a second voltage as a function of the second input current. A current steering element causes a first portion of current from a current source to flow to the first trans-impedance amplifier until the first current portion reaches the first threshold current, and causes a second portion of current from the current source to flow to the second trans-impedance amplifier, until the second current portion reaches the second threshold current. The second current portion is current from the current source that exceeds the first threshold current. The wide dynamic range trans-impedance amplifier may receive, for example, ion collector current from a hot cathode ionization gauge (HCIG).
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公开(公告)号：US20170317696A1
公开(公告)日：2017-11-02
申请号：US15651596
申请日：2017-07-17
Applicant: Telefonaktiebolaget LM Ericsson (Publ)
Inventor： Daniele MASTANTUONO , Sven MATTISSON , Roland STRANDBERG , Lars SUNDSTRÖM
CPC classification number: H04B1/0053 , H03F3/193 , H03F3/45179 , H03F2200/111 , H03F2200/222 , H03F2200/294 , H03F2200/333 , H03F2200/451 , H03F2203/45216 , H03F2203/45288 , H03F2203/45318 , H03G3/20 , H04B1/005
Abstract: A radio frequency receiver having a plurality of parallel receiving paths, wherein each path can receive a radio frequency signal in one of a plurality of radio frequency bands and amplify the received signal in a low noise amplifier. The amplified signals from the plurality of parallel paths are combined to one combined radio frequency signal in a common summation node and down-converted to a lower frequency signal in a mixer circuit. Each low noise amplifier comprises a low noise transconductance circuit providing a current signal to drive the common summation node, and an automatic gain control circuit in each path compensates for variations in signal strength independently of signal strengths of signals received by the other receiving paths. The receiver is suitable for simultaneous multiple band reception, where received signal strength can vary between the frequency bands.
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公开(公告)号：US20170302316A1
公开(公告)日：2017-10-19
申请号：US15098784
申请日：2016-04-14
Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.
Inventor： Hong-Lin CHU , Hsieh-Hung HSIEH , Tzu-Jin YEH
CPC classification number: H04B1/1036 , H03F1/565 , H03F3/193 , H03F3/3022 , H03F3/45071 , H03F2200/165 , H03F2200/171 , H03F2200/213 , H03F2200/222 , H03F2200/294 , H03F2200/336 , H03F2200/451 , H03F2203/30031 , H03F2203/45288 , H03H19/004
Abstract: A tunable matching circuit for use with ultra-low power RF receivers is described to support a variety of RF communication bands. A switched-capacitor array and a switched-resistor array are used to adjust the input impedance presented by the operating characteristics of transistors in an ultra-low-power mode. An RF sensor may be used to monitor performance of the tunable matching circuit and thereby determine optimal setting of the digital control word that drives the switched-capacitor array and switched-resistor array. An effective match over a significant bandwidth is achievable. The optimal matching configuration may be updated at any time to adjust to changing operating conditions. Memory may be used to store the optimal matching configurations of the switched capacitor array and switched resistor array.
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