AMPLIFIER CIRCUIT, CHIP, AND ELECTRONIC APPARATUS

WIPO Patent Application WO/2021/026860

A1

An amplifier circuit (100), a chip, and an electronic apparatus. The amplifier circuit generates a positive output signal (VOP) and a negative output signal (VON) according to a positive input signal (VIP) and a negative input signal (VIN). The positive input signal and the negative input signal have a corresponding input differential mode voltage and an input common mode voltage. The positive output signal and the negative output signal have a corresponding output differential mode voltage and an output common mode voltage. The amplifier circuit (100) comprises: an amplifier unit (120), which receives the positive input signal and the negative input signal, and generates the positive output signal and the negative output signal; and an attenuation unit (130) comprising: a positive common mode capacitor (107) and a negative common mode capacitor (117), used to attenuate the input common mode voltage below a first specific frequency; and a differential mode capacitor (110) used to attenuate the input differential mode voltage below a second specific frequency.

JP2006522570	Switchable amplifier circuit with low shutdown current
JP2531150	[Title of Invention] Semiconductor integrated circuit

WANG WEN-CHI (CN)

PCT/CN2019/100721

February 18, 2021

August 15, 2019

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SHENZHEN GOODIX TECH CO LTD (CN)

H03F3/20

CN104467713A	2015-03-25
CN104883047A	2015-09-02
CN102570989A	2012-07-11
US20180041110A1	2018-02-08

HANN, MATTHEW W: "Ultra-low Power Consumption, 18-bit High-precision Electrocardiogram (ECG) Data Acquisition System", ECG, vol. 18, 30 June 2013 (2013-06-30), pages 1 - 42, XP055770671, Retrieved from the Internet
See also references of EP 3806329A4

TIANTAI LAW FIRM (CN)

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