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公开(公告)号：US20190027821A1
公开(公告)日：2019-01-24
申请号：US15655098
申请日：2017-07-20
Applicant: Apple Inc.
Inventor： James G. Judkins , Jing Zhu , Liang Han , Matthew A. Mow , Mattia Pascolini , Ming-Ju Tsai , Thomas E. Biedka , Victor C. Lee , Xu Han
Abstract: An electronic device may be provided with control signal generation circuitry that generates a differential pair of control signals, power supply circuitry that generates a bias voltage, and an antenna having a tuning circuit. First switching circuitry may be coupled to the power supply circuitry and the control signal generation circuitry. Second switching circuitry may be coupled to the tuning circuit. A pair of control lines may be coupled between the first and second switching circuitry. In a first switching mode, the power supply circuitry may transmit the bias voltage to the tuning circuit over one of the control lines. The bias voltage may charge storage circuitry coupled to the tuning circuit. In a second switching mode, the control signal generation circuitry may transmit the differential pair of control signals to the tuning circuit. The tuning circuit may be powered by the storage circuitry in the second switching mode.
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公开(公告)号：US10186769B1
公开(公告)日：2019-01-22
申请号：US15655098
申请日：2017-07-20
Applicant: Apple Inc.
Inventor： James G. Judkins , Jing Zhu , Liang Han , Matthew A. Mow , Mattia Pascolini , Ming-Ju Tsai , Thomas E. Biedka , Victor C. Lee , Xu Han
Abstract: An electronic device may be provided with control signal generation circuitry that generates a differential pair of control signals, power supply circuitry that generates a bias voltage, and an antenna having a tuning circuit. First switching circuitry may be coupled to the power supply circuitry and the control signal generation circuitry. Second switching circuitry may be coupled to the tuning circuit. A pair of control lines may be coupled between the first and second switching circuitry. In a first switching mode, the power supply circuitry may transmit the bias voltage to the tuning circuit over one of the control lines. The bias voltage may charge storage circuitry coupled to the tuning circuit. In a second switching mode, the control signal generation circuitry may transmit the differential pair of control signals to the tuning circuit. The tuning circuit may be powered by the storage circuitry in the second switching mode.
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