SIGNAL AMPLIFYING SYSTEM IN A HALL DETECTING AND AMPLIFYING SYSTEM

申请号 US15897109 申请日 2018-02-14 公开(公告)号 US20180241365A1 公开(公告)日 2018-08-23
申请人 Chengdu Monolithic Power Systems Co., Ltd.; 发明人 Zhijiang Yang;
摘要 A signal amplifying system having an oscillator and an amplifying circuit. The oscillator has a first resistor with a first resistance R1 and a first capacitor with a first capacitance C1, and generates an oscillating signal having a frequency f which equals to k1/(R1*C1), k1 is a first proportional parameter. The amplifying circuit has an input terminal to receive an input signal and amplifies the input signal under the control of the oscillating signal. The amplifying circuit has a second resistor with a second resistance R2 and a second capacitor with a second capacitance C2. The amplifying circuit has a −3 dB bandwidth W−3 dB which equals to k2/(R2*C2), k2 is a second proportional parameter. In this signal amplifying system, the product of the first resistance R1 and the first capacitance C1 is proportional to the product of the second resistance R2 and the second capacitance C2.
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