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公开(公告)号：US20250069800A1
公开(公告)日：2025-02-27
申请号：US18454708
申请日：2023-08-23
Applicant: Apple Inc.
Inventor： Haowei Jiang , Ming-Da Tsai , Frederic Bossu
Abstract: An electronic device may include wireless circuitry having an on-chip transformer. The transformer may convey a radio-frequency signal and may include a primary coil and a secondary coil. The primary coil may have a center tap. A distributed capacitor array (DCA) may be coupled to the primary coil around the center tap. The DCA may include switchable capacitors coupled in parallel between ground and points on the primary coil on either side of the center tap. When active, each switchable capacitor contributes a different weighting to the operation of the transformer based on its distance from the center tap. A set of one or more of the switchable capacitors may be activated to contribute an asymmetric weighting to the operation of the transformer that mitigates process-related asymmetry in the transformer. This may serve to mitigate undesired common mode to direct mode signal conversion by the transformer.
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公开(公告)号：US20240097729A1
公开(公告)日：2024-03-21
申请号：US18466717
申请日：2023-09-13
Applicant: Apple Inc.
Inventor： Muhammad Adnan , Abdulrahman A Alhamed , Xiang Guan , Frederic Bossu
CPC classification number: H04B1/18 , H03F1/56 , H03F3/19 , H04B1/0458 , H03F2200/451
Abstract: An electronic device may include wireless circuitry having active circuitry such as active power splitter circuitry and active power combiner circuitry. The active power splitter and combiner circuitry can include single-ended or differential amplifiers coupled to one another using single-ended coupled lines or differential coupled lines. Each set of differential coupled lines may include first and second pairs of coupled lines. The single-ended coupled lines and the differential coupled lines can provide routing and impedance matching functions. In active power splitter circuitry, multiple transmitting amplifiers may be used to drive a plurality of antennas in a phased antenna array. In active power combiner circuitry, multiple receiving amplifiers may be used to receive radio-frequency signals from the plurality of antennas in the phased antenna array.
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公开(公告)号：US20240097728A1
公开(公告)日：2024-03-21
申请号：US18339870
申请日：2023-06-22
Applicant: Apple Inc.
Inventor： Muhammad Adnan , Abdulrahman A Alhamed , Xiang Guan , Frederic Bossu
CPC classification number: H04B1/18 , H03F1/56 , H03F3/19 , H04B1/0458 , H03F2200/451
Abstract: An electronic device may include wireless circuitry having active circuitry such as active power splitter circuitry and active power combiner circuitry. The active power splitter and combiner circuitry can include single-ended or differential amplifiers coupled to one another using single-ended coupled lines or differential coupled lines. Each set of differential coupled lines may include first and second pairs of coupled lines. The single-ended coupled lines and the differential coupled lines can provide routing and impedance matching functions. In active power splitter circuitry, multiple transmitting amplifiers may be used to drive a plurality of antennas in a phased antenna array. In active power combiner circuitry, multiple receiving amplifiers may be used to receive radio-frequency signals from the plurality of antennas in the phased antenna array.
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