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公开(公告)号：US12119789B2
公开(公告)日：2024-10-15
申请号：US18326746
申请日：2023-05-31
发明人： Sudipto Chakraborty
IPC分类号： H03F3/213 , H03B5/12 , H03F1/02 , H03F3/21 , H03F3/24 , H03F3/45 , H03G1/00 , H03G3/00 , H03G3/30 , H04B1/04
CPC分类号： H03B5/1212 , H03B5/1228 , H03B5/1265 , H03F1/0211 , H03F1/0277 , H03F3/211 , H03F3/213 , H03F3/245 , H03F3/45 , H03G1/0005 , H03G3/004 , H03G3/3042 , H04B2001/0416
摘要： A variable-gain power amplifying technique includes generating, with a network of one or more reactive components included in an oscillator, a first oscillating signal, and outputting, via one or more taps included in the network of the reactive components, a second oscillating signal. The second oscillating signal has a magnitude that is proportional to and less than the first oscillating signal. The power amplifying technique further includes selecting one of the first and second oscillating signals to use for generating a power-amplified output signal, and amplifying the selected one of the first and second oscillating signals to generate the power-amplified output signal.
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公开(公告)号：US20240275416A1
公开(公告)日：2024-08-15
申请号：US18585690
申请日：2024-02-23
申请人： pSemi Corporation
发明人： Rong Jiang , Khushali Shah , Peter Bacon
CPC分类号： H04B1/18 , G05F1/59 , H03F3/189 , H03G1/0088 , H03G3/3042 , H03H7/24 , H03H7/38 , H03K5/08 , H03F2200/294
摘要： A clamping circuit that may be used to provide efficient and effective voltage clamping in an RF front end. The clamping circuit comprises two series coupled signal path switches and a bypass switch coupled in parallel with the series coupled signal path switches. A diode is coupled from a point between the series coupled signal path switches to a reference potential. In addition, an output selection switch within an RF front end has integrated voltage clamping to more effectively clamp the output voltage from the RF front end. Additional output clamping circuits can be used at various places along a direct gain signal path, along an attenuated gain path and along a bypass path.
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公开(公告)号：US20240243714A1
公开(公告)日：2024-07-18
申请号：US18193243
申请日：2023-03-30
发明人： Ravikumar Pattipaka , Raja Sekhar , Sandeep Oswal
CPC分类号： H03F3/45475 , H03F1/3211 , H03G3/3042
摘要： An ultrasonic transmitter including a linear amplifier, an output stage, a switch, and a current compensation circuit. The linear amplifier includes first and second amplifier stages. The output stage has an input coupled to output of the linear amplifier, and presents the transmitter output. The switch is coupled to the output of the linear amplifier. The current compensation circuit has an output coupled at the output of the first amplifier stage. Select circuitry is configured to couple the switch to a bias terminal when the switch is closed, and to couple one or more nodes of the switch to the control terminal of the current compensation circuit when the switch is open. The current compensation circuit generates a compensation current responsive to a sensed non-linear current conducted through the switch when open.
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4.发明公开公开(公告)号：US20240214026A1
公开(公告)日：2024-06-27
申请号：US18557094
申请日：2021-04-30
发明人： Yiming SHEN , Carl CONRADI , John ILOWSKI
CPC分类号： H04B1/712 , H03F3/245 , H03G3/3042 , H04B1/0458 , H04B1/0483 , H03F2200/451
摘要： A method and a transmitter providing magnitude and phase adjustment for high output power radio frequency (RF) power amplifier (PA) combining are provided. According to one aspect, a method includes making adjustments to the magnitude and phase of a received signal to produce first and second amplifier input signals. The method also includes amplifying a respective one of the first and second amplifier input signals via respective first and second power amplifiers. The method further includes combining outputs from each of the first and second power amplifiers to produce a first transmit signal, and to produce an isolation signal indicative of an amount by which the outputs from the first and second power amplifiers differ in magnitude and phase. The isolation signal is used to adjust the received signal to drive the isolation signal toward zero.
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公开(公告)号：US20240089876A1
公开(公告)日：2024-03-14
申请号：US17943400
申请日：2022-09-13
申请人： Apple Inc.
CPC分类号： H04W52/52 , H03G3/3042 , H04W52/36
摘要： This disclosure is directed to compensating for gain drift due to switching the output power of a transmitter of an electronic device. In some cellular network applications, the transmit power level of a transmitter may be frequently adjusted from a low power level to a high power level. If the power level is not switched to the desired power level within a given interval, the transmission signal may be distorted. To enable the transmitter to reach a desired output power within the interval, the voltage supply of a power amplifier may be raised during a low power symbol, which may produce an undesirable gain increase. To mitigate or eliminate the low power symbol gain increase, a gain compensation signal may be introduced into the transmitter. The compensation signal may be adjusted and refined by implementing a power control loop, the power control loop may include a signal generator.
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公开(公告)号：US11894910B2
公开(公告)日：2024-02-06
申请号：US16727620
申请日：2019-12-26
CPC分类号： H04B7/15507 , H03G3/3042 , H04B1/0057 , H04B7/15535 , H04W52/52 , H03F3/20 , H03F2200/294 , H03F2200/451
摘要： Technology for a repeater is disclosed. The repeater can include a first-direction signal path configured to amplify and filter a signal in a first-direction band using a first bandpass filter. The repeater can include a second-direction signal path configured to amplify and filter a signal in a second-direction band using a second bandpass filter. The second-direction band can be spectrally adjacent to the first-direction band. The first bandpass filter and the second bandpass filter can provide filtering to isolate the first-direction band from the spectrally adjacent second-direction band.
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公开(公告)号：US11716063B2
公开(公告)日：2023-08-01
申请号：US17554917
申请日：2021-12-17
发明人： Guixiao He , Qingxue Zhang , Jiugao Peng , Shiwen Guo , Lei Cao , Haiquan Wu
CPC分类号： H03G3/32 , H03G3/3042 , H03G3/3089 , H03G5/165
摘要： The present application relates to the field of audio technology, and provides a method, a device, and an apparatus for playing audio, and a computer-readable storage medium. The method for playing audio includes: obtaining an ambient atmospheric pressure value and audio data to be played; obtaining multiple target frequency points contained in the audio data to be played when the ambient atmospheric pressure value meets a preset condition, and determining equal-loudness multiples corresponding to the target frequency points according to the ambient atmospheric pressure value and a preset calibration atmospheric pressure value; and sending the audio data to be played and the equal-loudness multiples of the target frequency points to a power amplifying module, such that the power amplifying module amplifies the audio data to be played according to the equal-loudness multiples corresponding to the target frequency points.
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公开(公告)号：US20230238995A1
公开(公告)日：2023-07-27
申请号：US18159296
申请日：2023-01-25
申请人： pSemi Corporation
发明人： Rong Jiang , Khushali Shah , Peter Bacon
CPC分类号： H04B1/18 , H03F3/189 , H03K5/08 , G05F1/59 , H03H7/24 , H03G3/3042 , H03H7/38 , H03G1/0088 , H03F2200/294
摘要： A clamping circuit that may be used to provide efficient and effective voltage clamping in an RF front end. The clamping circuit comprises two series coupled signal path switches and a bypass switch coupled in parallel with the series coupled signal path switches. A diode is coupled from a point between the series coupled signal path switches to a reference potential. In addition, an output selection switch within an RF front end has integrated voltage clamping to more effectively clamp the output voltage from the RF front end. Additional output clamping circuits can be used at various places along a direct gain signal path, along an attenuated gain path and along a bypass path.
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公开(公告)号：US20230208455A1
公开(公告)日：2023-06-29
申请号：US18146611
申请日：2022-12-27
CPC分类号： H04B1/04 , H03F3/245 , H01Q9/0407 , H03G3/3042 , H03F2200/451 , H03G2201/103 , H03G2201/307
摘要： Polyphase power amplifiers for load insensitivity are disclosed. In certain embodiments, a polyphase transmit system includes an intermediate frequency transceiver including a first complex mixer that outputs a plurality of intermediate frequency transmit signals of different phases, and an intermediate frequency to radio frequency module including a second complex mixer that generates a plurality of radio frequency transmit signals of different phases based on the plurality of intermediate frequency transmit signals, and a polyphase power amplifier that receives the plurality of radio frequency transmit signals and outputs an amplified radio frequency signal. The polyphase transmit system further includes an antenna that transmits the amplified radio frequency signal.
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公开(公告)号：US20230208374A1
公开(公告)日：2023-06-29
申请号：US17645758
申请日：2021-12-23
申请人： Intel Corporation
CPC分类号： H03G3/3042 , H03M1/183 , H03F1/0222 , H03F3/45475 , H03F2200/451 , H03F2203/45556 , H03F2203/45562 , H03F2203/45604
摘要： A current feedback amplifier (CFA). The CFA includes a common-gate input stage, a biasing circuitry, and a differential pair coupled in parallel between the supply voltage node and the reference voltage node. The common-gate input stage amplifies an input signal received at an input node and supplies it to a gate of the complementary transistors of the differential pair. The biasing circuitry supplies a bias voltage to a gate of the transistors of the common-gate input stage. The input node of the common-gate input stage and a node between the complementary transistors in the first path of the differential pair are shorted.
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