PREAMPLIFIER

WIPO Patent Application WO/2020/000168

A1

A preamplifier, comprising an input matching circuit (102), an input protection circuit (101), an amplification transistor (103), a negative feedback network (104), an output matching circuit (106), a filter circuit (108), and an output protection circuit (107). The amplification transistor (103) is connected to the output matching circuit (106) by means of a resistor (R4). The input matching circuit (102) comprises a capacitor (C1), a capacitor (C2), a capacitor (C3), and an inductor (L1). One end of each of the capacitor (C1), the capacitor (C2), and the capacitor (C3) is connected to the input protection circuit (101), and the other end of the capacitor (C1) is connected to an input port. The capacitor (C2) and the capacitor (C3) are connected in parallel. The other ends of the capacitor (C2) and the capacitor (C3), and one end of the inductor (L1) are connected to a gate of the amplification transistor (103), and the other end of the inductor (L1) is grounded. One end of the negative feedback network (104) is connected to a source of the amplification transistor (103), and the other end thereof is grounded to regulate a static operating point.

ZHENG HAIRONG (CN)
LI YE (CN)
CHEN QIAOYAN (CN)
LUO CHAO (CN)
LI ROU (CN)
HE QIANG (CN)
LIU XIN (CN)

PCT/CN2018/092794

January 02, 2020

June 26, 2018

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SHENZHEN INST ADV TECH (CN)

H03F1/26

CN201541238U	2010-08-04
CN102664595A	2012-09-12
CN101789761A	2010-07-28
US20170104461A1	2017-04-13

BEIJING CHENG HUI LAW FIRM (CN)

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