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公开(公告)号：US11031912B2
公开(公告)日：2021-06-08
申请号：US16307962
申请日：2017-06-09
申请人： ETL SYSTEMS LIMITED
发明人： Esen Bayar , Graham Quintal
摘要： There is provided an RF amplifier arrangement comprising: an input operable to receive an RF input signal; an output operable to output an amplified RF signal; at least one amplifier bank located between the input and output, the or each amplifier bank comprising a plurality of amplifier stages; an input level detector operable to measure the signal level of the RF input signal; and a controller operable to control the amplifier bank, wherein the controller is operable to select one or more different configurations of the amplifier by selecting one or more amplifier stages and/or modifying one or more characteristics of one or more amplifier stages in dependence upon the signal level of the RF input signal to dynamically adapt and optimise its characteristics.
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公开(公告)号：US11029338B2
公开(公告)日：2021-06-08
申请号：US15960588
申请日：2018-04-24
发明人： Cetin Kaya
摘要： A current sensor includes a die and a shunt resistor having a first temperature coefficient and having a first node and a second node fabricated onto the die, wherein the shunt resistor is for passing the current that is to be sensed. A first compensation resistor is fabricated onto the die and is coupled to the first node of the shunt resistor, wherein the first compensation resistor is proximate the shunt resistor and has a temperature coefficient that is similar to the temperature coefficient of the shunt resistor. A second compensation resistor is fabricated onto the die and is coupled to the second node of the shunt resistor, wherein the second compensation resistor is proximate the shunt resistor and has a temperature coefficient that is the close to the temperature coefficient of the shunt resistor.
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公开(公告)号：US20210135633A1
公开(公告)日：2021-05-06
申请号：US17030454
申请日：2020-09-24
申请人： MEDIATEK Inc.
发明人： Yu-Hao HSU , Shan-Chi YANG
IPC分类号： H03F1/30
摘要： The invention provides method and associated controller for improving temperature adaptability of an amplifier; the method may include: receiving a temperature value, and adjusting a supply voltage supplied to the amplifier according to the temperature value.
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公开(公告)号：US20210135629A1
公开(公告)日：2021-05-06
申请号：US17147845
申请日：2021-01-13
发明人： Hideki TANGO , Tatsuya HASHINAGA , Harutoshi TSUJI
摘要： Included are: a first power source 3 configured to output a voltage required for a first gate bias voltage for turning a power amplifier 2 to an ON state; a second power source 4 configured to output a voltage required for a second gate bias voltage for turning the power amplifier 2 to an OFF state; a changeover switch 5 connected between the first power source 3 and the power amplifier 2 and configured to supply either the first gate bias voltage or the second gate bias voltage to the power amplifier 2 by switching a state between the first power source 3 and the power amplifier 2 to either an open state or a short-circuit state on the basis of a control signal related to on-off control of the power amplifier 2; and a resistance value varying unit 15 connected between the second power source 4 and the power amplifier 2 and configured such that a resistance value thereof is variable.
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公开(公告)号：US10998862B2
公开(公告)日：2021-05-04
申请号：US16579120
申请日：2019-09-23
摘要： Methods and systems are provided for generating an oscillating signal for use as a clock in digital logic timing. The oscillating signal is generated via a differential RC relaxation oscillator including an oscillator core and biasing circuitry. The oscillator core may be configured such that the oscillating signal it generates is substantially sinusoidal or pseudo-sinusoidal and contains less harmonic content relative to a square wave signal. The biasing circuitry may be configured to have a reduced dependence on temperature so that the biasing values it provides vary less with temperature.
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公开(公告)号：US20210126586A1
公开(公告)日：2021-04-29
申请号：US17141418
申请日：2021-01-05
发明人： Takashi SOGA
摘要： A bias circuit includes first and second bipolar transistors, first and second field-effect transistors, and a filter circuit. The first field-effect transistor supplies a bias signal to an amplifier. The filter circuit is connected between a collector terminal of the first bipolar transistor and the ground through a base terminal of the first bipolar transistor. The filter circuit has frequency characteristics for attenuating a high frequency component of an RF signal to be input to the amplifier.
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公开(公告)号：US10980104B1
公开(公告)日：2021-04-13
申请号：US16568601
申请日：2019-09-12
申请人： Panasonic Automotive Systems Company of America, Division of Panasonic Corporation of North America
发明人： Gerald A. Tang-Kong
摘要： A power amplifier arrangement for a motor vehicle includes a printed circuit board disposed between a housing on a first side of the printed circuit board and a heat sink on a second side of the printed circuit board. A power amplifier is mounted on the second side of the printed circuit board. A bracket is supported by the housing. A clamping spring is supported by the bracket such that the clamping spring is in biased engagement with the first side of the printed circuit board, and such that the power amplifier is pressed into engagement with the heat sink.
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公开(公告)号：US10979004B2
公开(公告)日：2021-04-13
申请号：US16794841
申请日：2020-02-19
发明人： Yuri Honda , Fumio Harima , Satoshi Tanaka
摘要： A power amplifier circuit includes an amplifier transistor having a base, a collector, a bias circuit, and a first resistance element connected between the base of the amplifier transistor and the bias circuit. The bias circuit includes a voltage generation circuit, a first transistor having a base to which a first direct-current voltage is supplied, and an emitter from which the bias current or voltage is supplied, a second transistor having a base to which a second direct-current voltage is supplied, and an emitter connected to the emitter of the first transistor, a signal supply circuit disposed between the base of the amplifier transistor and the base of the second transistor, and an impedance circuit disposed between the base of the first transistor and the base of the second transistor.
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公开(公告)号：US20210104981A1
公开(公告)日：2021-04-08
申请号：US16592839
申请日：2019-10-04
摘要： A radio frequency (RF) front-end receiver having a passive mixer with feed-forward intermodulation distortion cancellation, or at least reduction. An example receiver generally includes a mixer having differential input terminals and differential output terminals and a baseband filter having inputs coupled to the differential output terminals of the mixer. The receiver also includes common-mode sensing circuitry coupled to the differential input terminals of the mixer and configured to sense a common-mode signal of a first differential signal present at the differential input terminals of the mixer. The receiver further includes a conversion circuit coupled to the common-mode sensing circuitry and configured to convert the common-mode signal to a second differential signal presented to the differential output terminals of the mixer and the inputs of the baseband filter.
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公开(公告)号：US20210091731A1
公开(公告)日：2021-03-25
申请号：US16726327
申请日：2019-12-24
发明人： Je Hee CHO , Kyu Jin CHOI
摘要： An amplifying device includes a current generating circuit, a bias amplifying circuit, and a compensation circuit. The current generating circuit is configured to generate an internal current based on an internal voltage. The bias amplifying circuit, connected to the current generating circuit, is configured to output a bias current generated by amplifying the internal current to a power amplifying circuit. The compensation circuit, connected to the current generating circuit, is configured to adjust the internal voltage based on a bias voltage of the power amplifying circuit.
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