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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：US11095324B2
公开(公告)日：2021-08-17
申请号：US16817718
申请日：2020-03-13
发明人： Jian-You Chen , Hsiao-Tsung Yen , Beng-Meng Chen
摘要： A wireless transmission circuit includes a first induction circuit, a second induction circuit, a detection circuit, a first signal adjustment circuit, and a third induction circuit. The first induction circuit is configured to receive a first signal outputted from a power amplifier. The second induction circuit is configured to output the received first signal as a second signal. The detection circuit is configured to detect a common mode signal associated with the first signal. The first signal adjustment circuit is configured to adjust a phase or an amplitude of the common mode signal to generate a third signal. The third induction circuit is configured to receive the third signal and be coupled to the second induction circuit to reduce a second harmonic in the second signal.
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公开(公告)号：US11323125B2
公开(公告)日：2022-05-03
申请号：US17200011
申请日：2021-03-12
发明人： Beng-Meng Chen , Chien-Jung Huang
摘要： A transceiver circuit is configured to couple an oscillation crystal. The transceiver circuit includes a local oscillator, a filter circuit, a control circuit, and a radio frequency signal generator circuit. The local oscillator includes a capacitive element. The local oscillator generates a phase locked loop signal based on an oscillation frequency of the oscillation crystal and a capacitance value of the capacitive element. The filter circuit generates a filtered signal according to the phase locked loop signal. The control circuit adjusts the capacitance value to be an adjusted capacitance value according to the filtered signal and the phase locked loop signal. The local oscillator further generates a calibrated local oscillation signal according to the oscillation frequency and the adjusted capacitance value. The radio frequency signal generator circuit generates a radio frequency signal according to the calibrated local oscillation signal and a baseband signal.
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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：US11418157B1
公开(公告)日：2022-08-16
申请号：US17337588
申请日：2021-06-03
发明人： Beng-Meng Chen , Chien-Jung Huang , Jhih-Yuan Ke
摘要： A gain control circuit utilized in a transmitter is disclosed. The transmitter is configured to amplify an input signal according to a gain via a digital amplifier, an analog amplifier and a power amplifier, to generate an output signal. The gain control circuit includes a correction unit configured to calculate a correction power according to an elapsed time since a current packet transmission duration of the transmitter is completed. The gain control circuit adjusts the gain according to the correction power, a transmitter signal strength indication of the input signal and an environment temperature of the transmitter.
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