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公开(公告)号：US20220257126A1
公开(公告)日：2022-08-18
申请号：US17622280
申请日：2020-06-26
申请人： Yu-Pin Hsu , Zemin Liu , Mona Mostafa Hella
发明人： Yu-Pin Hsu , Zemin Liu , Mona Mostafa Hella
摘要： One embodiment provides an offset calibration circuitry configured to compensate an offset voltage of a resistive bridge sensor. The offset calibration circuitry includes a first current digital to analog converter (IDAC) coupled to a first successive approximation register (SAR), a second IDAC coupled to a second SAR and an SAR controller circuitry. The first IDAC is configured to couple to a negative voltage port of a resistive bridge sensor. The first SAR is configured to store a circuitry first digital value. The second IDAC is configured to couple to a positive voltage port of the resistive bridge sensor. The second SAR is configured to store a second digital value. The SAR controller circuitry is configured to adjust each bit of the first SAR and each bit of the second SAR based, at least in part, on an output of a comparator. The comparator is configured to compare a voltage on the negative voltage port or a voltage on the positive voltage port to a common mode voltage.
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公开(公告)号：US20220271784A1
公开(公告)日：2022-08-25
申请号：US17631026
申请日：2020-07-28
申请人： Kefei Wu , Mona Mostafa Hella
发明人： Kefei Wu , Mona Mostafa Hella
摘要： One embodiment provides a broadband signal source. The broadband signal source includes a number, n, signal paths and a combiner circuitry. Each signal path, i, includes a programmable phase shifter circuitry, an amplifier circuitry and a harmonic generation circuitry. The programmable phase shifter circuitry is configured to phase shift a path input signal by a respective phase angle, θi. The path input signal corresponds to a source input signal having a fundamental frequency, f, and an input signal bandwidth. The amplifier circuitry is configured to amplify the phase shifted path input signal. The harmonic generation circuitry is configured to generate a path output signal including a plurality of harmonics of the amplified phase shifted path input signal. The combiner circuitry is configured to combine the number, n, path output signals to produce a broadband output signal having an output signal center frequency greater than the input signal fundamental frequency and an output signal bandwidth greater than the input signal bandwidth.
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公开(公告)号：US11831348B2
公开(公告)日：2023-11-28
申请号：US17631026
申请日：2020-07-28
申请人： Kefei Wu , Mona Mostafa Hella
发明人： Kefei Wu , Mona Mostafa Hella
CPC分类号： H04B1/0483 , H04L27/04 , H04L27/36
摘要： One embodiment provides a broadband signal source. The broadband signal source includes a number, n, signal paths and a combiner circuitry. Each signal path, i, includes a programmable phase shifter circuitry, an amplifier circuitry and a harmonic generation circuitry. The programmable phase shifter circuitry is configured to phase shift a path input signal by a respective phase angle, θi. The path input signal corresponds to a source input signal having a fundamental frequency, f, and an input signal bandwidth. The amplifier circuitry is configured to amplify the phase shifted path input signal. The harmonic generation circuitry is configured to generate a path output signal including a plurality of harmonics of the amplified phase shifted path input signal. The combiner circuitry is configured to combine the number, n, path output signals to produce a broadband output signal having an output signal center frequency greater than the input signal fundamental frequency and an output signal bandwidth greater than the input signal bandwidth.
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