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公开(公告)号：US20240348217A1
公开(公告)日：2024-10-17
申请号：US18526088
申请日：2023-12-01
发明人： David KROLAK , Pavel HORSKY
IPC分类号： H03F3/45
CPC分类号： H03F3/4508 , H03F2203/45266
摘要： An asymmetric amplifier circuit is disclosed. The amplifier circuit includes an input-stage circuit and an output-stage circuit. The input stage circuit can include a first terminal with a first input impedance and a second terminal with a second input impedance different than the first input impedance. The input-stage circuit may be configured to receive a first input signal on the first input terminal, receive a second input signal on the second input terminal, and generate a first amplified signal and a second amplified signal using the first input signal and the second input signal. The output-stage circuit may be configured to asymmetrically combine the first amplified signal and the second amplified signal to generate an output signal.
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公开(公告)号：US11942903B1
公开(公告)日：2024-03-26
申请号：US17130365
申请日：2020-12-22
CPC分类号： H03F1/302 , H01L27/082 , H01L29/1608 , H03F3/4508 , H10N10/17 , H03F2200/447
摘要： Two Silicon Carbide negative positive negative transistors realized on a monolithic substrate as a differential pair to keep their base-emitter junctions at nearly the same temperature such that their kT/q sensitivities tract together with their base connections electrically connected to the cold junction terminals of a thermocouple to create an amplified differential voltage across output load resistors while operating at high temperature.
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公开(公告)号：US20240097631A1
公开(公告)日：2024-03-21
申请号：US18262626
申请日：2022-03-14
IPC分类号： H03F3/45
CPC分类号： H03F3/45179 , H03F3/4508 , H03F2200/135 , H03F2203/45512
摘要： The operational amplifier disclosed includes an input stage configured to receive power from a floating supply in a low voltage range that can float according to the common mode voltage at the input. The floating supply facilitates the use of low voltage components that can improve the precision of the operational amplifier by lowering the offset voltage. The input stage includes a first gain stage including field effect transistors and a second gain stage using bipolar transistors. The gain stages can be implemented differently to accommodate different applications and fabrication capabilities.
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公开(公告)号：US20190204863A1
公开(公告)日：2019-07-04
申请号：US16157077
申请日：2018-10-10
发明人： Hwey-Ching Chien
CPC分类号： G05F3/222 , G05F3/20 , H03F3/4508 , H03F2203/45022 , H03F2203/45318 , H03F2203/45352
摘要： A reference voltage generator includes a voltage generation circuit, an amplifier, a diode unit and a transistor. The voltage generation circuit includes an output terminal for outputting a reference voltage, a first terminal having an operational voltage, and a second terminal. The amplifier includes an input terminal coupled to the first terminal of the voltage generation circuit, an output terminal, a first terminal coupled to a first voltage terminal, and a second terminal. The diode unit includes a first terminal coupled to the second terminal of the amplifier, and a second terminal coupled to the second terminal of the voltage generation circuit and a second voltage terminal. The transistor includes a first terminal coupled to the first terminal of the amplifier, a second terminal coupled to the output terminal of the voltage generation circuit, and a control terminal coupled to the output terminal of the amplifier.
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公开(公告)号：US20190190462A1
公开(公告)日：2019-06-20
申请号：US16225912
申请日：2018-12-19
发明人： Yu Zhu , Boshi Jin , Steven Christopher Sprinkle , Florinel G. Balteanu , Oleksiy Klimashov , Dylan Charles Bartle , Paul T. DiCarlo
IPC分类号： H03F1/32 , H03F3/193 , H03F3/45 , H04B1/40 , H04B1/3827 , H04B1/525 , H03F3/19 , H03F1/02 , H03F3/195 , H03F3/21 , H04B1/48 , H03F3/24
CPC分类号： H03F1/3205 , H03F1/0266 , H03F1/32 , H03F3/19 , H03F3/193 , H03F3/195 , H03F3/211 , H03F3/245 , H03F3/4508 , H03F3/45179 , H03F2200/102 , H03F2200/105 , H03F2200/15 , H03F2200/294 , H03F2200/451 , H03F2201/3215 , H03F2201/3236 , H04B1/3827 , H04B1/40 , H04B1/48 , H04B1/525 , H04B2001/485 , H04W88/02
摘要： A linearization circuit that reduces intermodulation distortion in an amplifier output receives a first signal that includes a first frequency and a second frequency and generates a difference signal having a frequency approximately equal to the difference of the first frequency and the second frequency. The linearization circuit generates an envelope signal based at least in part on a power level of the first signal and adjusts a magnitude of the difference signal based on the envelope signal. When the amplifier receives the first signal at an input terminal and the adjusted signal at a second terminal, intermodulation between the adjusted signal and the first signal cancels at least a portion of the intermodulation products that result from the intermodulation of the first frequency and the second frequency.
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公开(公告)号：US20180226929A1
公开(公告)日：2018-08-09
申请号：US15426917
申请日：2017-02-07
申请人： Xilinx, Inc.
CPC分类号： H03F3/4508 , G01K7/01 , G05F3/30 , H03F1/0216 , H03F3/45475 , H03F2200/213 , H03F2200/261 , H03F2200/468 , H03F2203/45514 , H03F2203/45544 , H03G3/001 , H03G3/30
摘要： A circuit for implementing a multifunction output generator is described. The circuit comprises an amplifier circuit having a first input and a second input; a voltage generator coupled at a first node to a first input of the amplifier circuit; a controllable current source configured to provide a variable current to the first node; and a switching circuit enabling the operation of the amplifier circuit in a first mode for sensing a temperature and a second mode for providing a reference voltage. A method of implementing a multifunction output generator is described.
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公开(公告)号：US20180198431A1
公开(公告)日：2018-07-12
申请号：US15860870
申请日：2018-01-03
发明人： Naoki ITABASHI
CPC分类号： H03G3/20 , H03F1/3211 , H03F3/4508 , H03F3/45089 , H03F3/45475 , H03F3/45502 , H03F3/55 , H03F3/605 , H03F2203/45392 , H03F2203/45466 , H03G1/0023 , H03G1/0088 , H03G3/001 , H03G3/30
摘要： A variable gain amplifier capable of stabilizing an average output potential of a differential output signal, improving power efficiency over a wide range of an amplitude of the differential input signal, and suppressing deterioration of a distortion rate is provided. The variable gain amplifier includes an amplifying circuit configured to amplify a differential input signal with a gain according to a gain control signal, and a current control circuit. The amplifying circuit has a first current source supplying a source current. The current control circuit adjusts a magnitude of the source current of the first current source according to a magnitude of the gain control signal.
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公开(公告)号：US09966917B2
公开(公告)日：2018-05-08
申请号：US15460750
申请日：2017-03-16
申请人： INPHI CORPORATION
CPC分类号： H03G3/3036 , H03F1/0205 , H03F1/083 , H03F3/19 , H03F3/211 , H03F3/4508 , H03F3/45085 , H03F2200/451 , H03F2200/91 , H03F2203/45458 , H03F2203/45496 , H03F2203/45644 , H03G1/0023 , H03G1/0082 , H03G5/28
摘要： A variable gain amplifier having stabilized frequency response for widened gain control range. A resistor-capacitor compensation network is provided between two differential current input ports and corresponding emitter nodes of cross-coupled four transistors in the variable gain amplifier to desensitize the gain control voltages to the system noise and provide compensation to the VGA frequency response when the differential gain control voltage varies the gain setting, yielding a substantially stabilized frequency response over a −3 dB bandwidth ranging from 1 GHz to 60 GHz with a widened gain control range up to 12 dB without increasing power consumption.
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公开(公告)号：US20170359042A1
公开(公告)日：2017-12-14
申请号：US15177459
申请日：2016-06-09
发明人： David Dascher
CPC分类号： H03G1/0088 , H03F3/4508 , H03F3/45085 , H03F3/45475 , H03F3/55 , H03F3/605 , H03F2200/285 , H03F2200/291 , H03F2203/45288 , H03F2203/45612 , H03G1/0023 , H03G3/001 , H03G2201/40
摘要： Distributed amplifier systems and methods are disclosed. An example distributed amplifier system includes first stage traveling wave amplifier (TWA) circuitry that is controllable to provide one of a first set of discrete gain settings. The first stage TWA circuitry includes a first input transmission line, a first output transmission line, and a first plurality of amplifiers coupled antiparallel between the first input transmission line and the first output transmission line. The first set of discrete gain settings has approximately constant logarithmic spacing.
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公开(公告)号：US20170359041A1
公开(公告)日：2017-12-14
申请号：US15178217
申请日：2016-06-09
发明人： Sean T. Morley
CPC分类号： H03F3/45273 , H03F1/3211 , H03F3/19 , H03F3/193 , H03F3/195 , H03F3/21 , H03F3/3016 , H03F3/45071 , H03F3/4508 , H03F3/45085 , H03F3/45174 , H03F3/45183 , H03F3/50 , H03F2200/165 , H03F2200/451 , H03F2200/456 , H03F2200/513 , H03F2200/69 , H03F2200/72 , H03F2200/75 , H03F2203/45112 , H03F2203/45646
摘要： Provided herein are amplifiers, such as buffers, with increased headroom. An amplifier stage includes a follower transistor and current source configured to receive a power supply voltage comprising an alternating current component and a direct current component. The alternating current component of the power supply voltage has substantially the same frequency and magnitude as the input signal received by the follower transistor. In radio frequency (RF) and intermediate frequency (IF) buffer applications, for example, the increased headroom can allow for linear buffering of an input signals with increased amplitude so that the output power one decibel (OP1dB) compression point can be increased.
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