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公开(公告)号：US20240313706A1
公开(公告)日：2024-09-19
申请号：US18433468
申请日：2024-02-06
Applicant: MEDIATEK INC.
Inventor： You-Shin Chen , Ya-Chi Chen , Sung-Han Wen
CPC classification number: H03F1/0233 , H03F3/183 , H03F2200/03
Abstract: The present invention provides a multi-stage amplifier, wherein the multi-stage amplifier includes a plurality of amplifier stages and a compensation circuit. The compensation circuit is coupled to an output terminal of one of the plurality of amplifier stages, and the compensation circuit includes a first auxiliary amplifier, a capacitor, a second auxiliary amplifier, a first resistor and a second resistor. The capacitor is coupled between an input terminal and an output terminal of the first auxiliary amplifier. The second auxiliary amplifier is coupled to the first auxiliary amplifier. The first resistor is coupled between an input terminal and an output terminal of the second auxiliary amplifier. The second resistor is coupled between an output terminal of the first auxiliary amplifier and a ground voltage.
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公开(公告)号：US20190166566A1
公开(公告)日：2019-05-30
申请号：US16121644
申请日：2018-09-05
Applicant: MEDIATEK INC.
Inventor： Sung-Han Wen , Ya-Chi Chen
Abstract: The present invention provides an amplifier circuit, wherein the amplifier circuit includes a DAC, an output stage and a detector. In the operations of the amplifier circuit, the DAC is arranged for performing a digital-to-analog converting operation upon a digital input signal to generate an analog signal, the output stage is arranged for receiving the analog signal to generate an output signal, and the detector is arranged for detecting a characteristic of the input signal, and referring to the characteristic of the input signal to generate at least one control signal to adjust the output stage at a zero-crossing point of the output signal.
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公开(公告)号：US10555269B2
公开(公告)日：2020-02-04
申请号：US16121644
申请日：2018-09-05
Applicant: MEDIATEK INC.
Inventor： Sung-Han Wen , Ya-Chi Chen
Abstract: The present invention provides an amplifier circuit, wherein the amplifier circuit includes a DAC, an output stage and a detector. In the operations of the amplifier circuit, the DAC is arranged for performing a digital-to-analog converting operation upon a digital input signal to generate an analog signal, the output stage is arranged for receiving the analog signal to generate an output signal, and the detector is arranged for detecting a characteristic of the input signal, and referring to the characteristic of the input signal to generate at least one control signal to adjust the output stage at a zero-crossing point of the output signal.
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