Invention Grant
US09509268B2 Signal amplifying system, AC signal generating circuit, amplifying gain acquiring method, and AC signal generating method
有权
信号放大系统，交流信号发生电路，放大增益获取方法和交流信号产生方法
- Patent Title: Signal amplifying system, AC signal generating circuit, amplifying gain acquiring method, and AC signal generating method
- Patent Title (中): 信号放大系统，交流信号发生电路，放大增益获取方法和交流信号产生方法
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Application No.: US14533072Application Date: 2014-11-04
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Publication No.: US09509268B2Publication Date: 2016-11-29
- Inventor: Chih-Yi Kuan
- Applicant: MEDIATEK INC.
- Applicant Address: TW Hsin-Chu
- Assignee: MEDIATEK INC.
- Current Assignee: MEDIATEK INC.
- Current Assignee Address: TW Hsin-Chu
- Agent Winston Hsu; Scott Margo
- Main IPC: G01R19/00
- IPC: G01R19/00 ; H03G3/20 ; H03G3/30
Abstract:
A signal amplifying system comprising: an amplifying module with a plurality of PGAs coupled in series; a test signal generating circuit, for generating a test signal fed to one test input PGA; and a control circuit. If the test input PGA is not a final PGA, the final PGA outputs an output test signal amplified by the test input PGA and the PGA following the test input PGA, wherein each of the PGA following the test input PGA has a known amplifying gain. The control circuit acquires an accumulated gain for the test input PGA and the PGA following the test input PGA based on the output test signal, and acquires an amplifying gain of the test input PGA based on the accumulated gain.
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