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公开(公告)号：US11558020B2
公开(公告)日：2023-01-17
申请号：US17364982
申请日：2021-07-01
发明人： Beng-Meng Chen , Chien-Jung Huang , Yi-Hua Lu
摘要： A transmission circuit includes a power amplifier, a power amplifier forestage circuit and a signal strength adjusting circuit. The power amplifier is configured to amplify an input signal to output an output signal. The power amplifier forestage circuit is configured to output the input signal. The signal strength adjusting circuit includes a conversion circuit, a processing circuit and a storage unit. The conversion circuit is configured to convert the voltage of the output signal into an operation value. The processing circuit is configured to perform an operation according to a target index value stored by the storage unit and the operation value to obtain a differential value. The processing circuit is further configured to adjust the input signal outputted by the power amplifier forestage circuit according to the differential value, so that the power of the output signal is maintained at a target power value.
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公开(公告)号：US11522621B2
公开(公告)日：2022-12-06
申请号：US17369108
申请日：2021-07-07
发明人： Chien-Jung Huang , Yi-Hua Lu
摘要： The present invention discloses a calibration method and calibration circuit for a wireless transceiver. The wireless transceiver includes a transmission path and a reception path, and there is a mixer on the transmission path. The calibration method includes the following steps: (A) adjusting a first parameter of a first LC tank circuit of the mixer; (B) receiving a first input signal via a coupling path and the reception path; (C) measuring a first power of the first input signal; (D) repeating steps (A) to (C) to obtain multiple first powers; and (E) determining a first target parameter corresponding to a largest power of the first powers.
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公开(公告)号：US10742245B1
公开(公告)日：2020-08-11
申请号：US16711490
申请日：2019-12-12
发明人： Beng-Meng Chen , Chien-Jung Huang , Yi-Hua Lu
摘要： A device includes a baseband circuit that generates a first digital signal, a digital-to-analog converter (DAC) that converts the first digital signal into a baseband signal, a first mixer that generates a first mixed signal based on the baseband signal and a first reference signal, a second mixer that generates a second mixed signal based on the baseband signal and a second reference signal, a third mixer that generates a down-converted signal based on the first mixed signal and the second mixed signal, and an analog-to-digital converter (ADC) that converts the down-converted signal into a second digital signal. The frequency of the first reference signal is different from the frequency of the second reference signal.
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公开(公告)号：US20220149798A1
公开(公告)日：2022-05-12
申请号：US17364982
申请日：2021-07-01
发明人： Beng-Meng CHEN , Chien-Jung Huang , Yi-Hua Lu
摘要： A transmission circuit includes a power amplifier, a power amplifier forestage circuit and a signal strength adjusting circuit. The power amplifier is configured to amplify an input signal to output an output signal. The power amplifier forestage circuit is configured to output the input signal. The signal strength adjusting circuit includes a conversion circuit, a processing circuit and a storage unit. The conversion circuit is configured to convert the voltage of the output signal into an operation value. The processing circuit is configured to perform an operation according to a target index value stored by the storage unit and the operation value to obtain a differential value. The processing circuit is further configured to adjust the input signal outputted by the power amplifier forestage circuit according to the differential value, so that the power of the output signal is maintained at a target power value.
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