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21.发明授权公开(公告)号：US11527997B2
公开(公告)日：2022-12-13
申请号：US17021976
申请日：2020-09-15
发明人： Junhyung Lee , Johannes Jacobus Emile Maria Hageraats , Joshua Haeseok Cho , Aravind Kumar Padyana , Bipul Agarwal
IPC分类号： H03F1/02 , H03F3/19 , H03F1/56 , H03G3/30 , H03F1/22 , H03F1/32 , H03F3/193 , H03F3/72 , H03G1/00 , H03G5/28 , H04B1/3827
摘要： Disclosed herein are signal amplifiers having a plurality of amplifier cores. Individual amplifier cores can be designed to enhance particular advantages while reducing other disadvantages. The signal amplifier can then switch between amplifier cores in a particular gain mode to achieve desired performance characteristics (e.g., improving noise figure or linearity). Examples of signal amplifiers disclosed herein include amplifier architectures with a low noise figure amplifier core that reduces the noise figure and a linearity boost amplifier core that increases linearity. The disclosed signal amplifiers can switch between a first active core and a second active core for a single or particular gain mode to achieve desired signal characteristics during different time periods.
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公开(公告)号：US20220385254A1
公开(公告)日：2022-12-01
申请号：US17826692
申请日：2022-05-27
发明人： Sehoon Park , Daewoong Park , Pierre Wambacq , Jan Craninckx
摘要： A differential amplifier is provided. The differential amplifier includes a first single-ended amplifying means including at least a first terminal and a second terminal, a second single-ended amplifying means including at least a first terminal and a second terminal, a first transmission line, and a second transmission line. In this context, the first terminal of the first single-ended amplifying means is connected to the second terminal of the second single-ended amplifying means via the first transmission line. In addition to this, the first terminal of the second single-ended amplifying means is connected to the second terminal of the first single-ended amplifying means via the second transmission line.
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公开(公告)号：US20220368300A1
公开(公告)日：2022-11-17
申请号：US17552791
申请日：2021-12-16
申请人： Qorvo US, Inc.
发明人： Nadim Khlat
摘要： A lookup table calibration apparatus and method are disclosed. The lookup table calibration apparatus includes a power amplifier circuit configured to amplify a radio frequency (RF) signal having time-variant power levels based on a modulated voltage. To ensure proper alignment between the modulated voltage and the time-variant power levels, the power amplifier circuit is further configured to phase-shift the RF signal based on a modulated phase correction voltage. Specifically, the modulated voltage is generated based on a modulated voltage lookup table and the modulated phase correction voltage is generated based on a phase correction voltage lookup table. Herein, the lookup table calibration apparatus can be configured to concurrently populate and/or calibrate the modulated voltage lookup table and the phase correction voltage lookup table based on a measured gain and a measured phase of the RF signal, respectively.
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公开(公告)号：US11502658B2
公开(公告)日：2022-11-15
申请号：US17183100
申请日：2021-02-23
申请人： Kandou Labs SA
发明人： Suhas Rattan , Kiarash Gharibdoust
摘要： The detection matrix for an Orthogonal Differential Vector Signaling code is typically embodied as a transistor circuit with multiple active signal inputs. An alternative detection matrix approach uses passive resistor networks to sum at least some of the input terms before active detection.
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公开(公告)号：US20220355193A1
公开(公告)日：2022-11-10
申请号：US17867004
申请日：2022-07-18
发明人： Shobha Devi Kuruba Buchannagari , Kevin Robertson , Scott Warren , Carmine Bonanno , Richard Kulavik
摘要： Methods and systems are provided for independent audio volume control. User input may be received in an audio setup configured for combined-audio, with the user input including one or both of a selection of a desired volume of a first type audio component of the combined-audio signal, and a selection of a desired volume of a second type audio component of the combined-audio signal. Based on the user input, a corresponding mix setting may be determined, with the mix setting including one or more control parameters for adaptively controlling mixing of the first type audio component and the second type audio component to generate the combined-audio signal. The mix setting may be determined based on a data set characterizing an audio device where at least portion of the mixing is performed. The data set may be pre-programmed and/or determined based on testing of the audio device.
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公开(公告)号：US11483020B1
公开(公告)日：2022-10-25
申请号：US17302478
申请日：2021-05-04
申请人： NXP USA, Inc.
发明人： Sriharsha Madhira
摘要： A gain adjustment circuit is coupled with a transmitting device and a receiving device that are in proximity to each other. The gain adjustment circuit receives a baseband signal that is generated based on gain signals and a power associated with a reception of a data packet by the receiving device. The gain adjustment circuit further receives previous transmission information of the transmitting device. The gain adjustment circuit predicts a time of transmission of a control packet from the transmitting device and determines whether the time of transmission overlaps with a time period of reception of the data packet by the receiving device. The gain adjustment circuit further generates and provides gain signals to the receiving device such that a signal interference during the transmission of the control packet and the reception of the data packet is mitigated.
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公开(公告)号：US11476807B2
公开(公告)日：2022-10-18
申请号：US17082990
申请日：2020-10-28
发明人： Shigeki Koya , Takayuki Tsutsui , Yasunari Umemoto , Isao Obu , Satoshi Tanaka
摘要： A power amplifier module includes a first amplifier circuit that amplifies a radio frequency signal with a first gain corresponding to a first control signal to generate a first amplified signal; a second amplifier circuit that amplifies the first amplified signal with a second gain corresponding to a second control signal to generate a second amplified signal; and a control unit that generates the first control signal and the second control signal. The second control signal is a control signal for increasing a power-supply voltage for the second amplifier circuit as a peak-to-average power ratio of the radio frequency signal increases. The first control signal is a control signal for controlling the first gain of the first amplifier circuit so that a variation in the second gain involved in a variation in the power-supply voltage for the second amplifier circuit is compensated for.
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公开(公告)号：US20220329222A1
公开(公告)日：2022-10-13
申请号：US17224497
申请日：2021-04-07
摘要： An asymmetric signal path approach is used to extract differential signals out of the photodetector (e.g., a photodiode) for amplification by a differential transimpedance amplifier (TIA). This asymmetric-path differential TIA configuration has less low-frequency Inter Symbol Interference (ISI) (also known as Baseline Wander), less high-frequency noise amplification, and higher bandwidth capabilities. There is no power penalty with this design in comparison to a single-ended TIA, can extend the range of the link for a given system power consumption, and can decrease transmitter power for a given range.
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公开(公告)号：US20220328060A1
公开(公告)日：2022-10-13
申请号：US17723317
申请日：2022-04-18
发明人： Xuejing SUN , Glenn N. DICKINS
IPC分类号： G10L21/0364 , G10L21/0316 , G10K11/16 , H03G3/32 , G10L21/0224 , G10L21/034 , G10L25/78 , H03G3/30
摘要： A method, an apparatus, and logic to post-process raw gains determined by input processing to generate post-processed gains, comprising using one or both of delta gain smoothing and decision-directed gain smoothing. The delta gain smoothing comprises applying a smoothing filter to the raw gain with a smoothing factor that depends on the gain delta: the absolute value of the difference between the raw gain for the current frame and the post-processed gain for a previous frame. The decision-directed gain smoothing comprises converting the raw gain to a signal-to-noise ratio, applying a smoothing filter with a smoothing factor to the signal-to-noise ratio to calculate a smoothed signal-to-noise ratio, and converting the smoothed signal-to-noise ratio to determine the second smoothed gain, with smoothing factor possibly dependent on the gain delta.
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公开(公告)号：US11469730B2
公开(公告)日：2022-10-11
申请号：US17099183
申请日：2020-11-16
摘要： A bias structure includes a reference voltage node connected to gate structures of a first NMOS transistor and a second NMOS transistor, a bias voltage node comprising a bias voltage, and a first op amp having a first input connected to the reference voltage, a second input connected to a drain of the first NMOS transistor, and an output connected to gate structures of a first PMOS transistor and a second PMOS transistor. The bias structure further includes a second op amp having a first input connected to the reference voltage, a second input connected to a drain of the second NMOS transistor, and an output connected to a gate structure of a third NMOS transistor and the bias voltage node. The first NMOS transistor matches a transistor of a differential pair of an integrated circuit device.
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