Broadband fully-differential low-noise amplifier

• Main Authors: LI TAI'AN, ZHANG WEI
• Format: Patent
• Language: Chinese; English
• Published: 19.02.2019
• Subjects: AMPLIFIERS; BASIC ELECTRONIC CIRCUITRY; ELECTRICITY

The invention relates to a broadband fully-differential low-noise amplifier. The low-noise amplifier is characterized by including two levels consisting of an input matching level circuit and a noiseneutralizing level circuit; the input end of the input matching level circuit receives signals (IN1/IN2) of a signal input end, and generates two channels of signals which are opposite in phase; the two channels of signals are respectively output to a next level of noise neutralizing level circuit by a high-pass filter consisting of capacitors and resistors; the noise neutralizing level circuit isprovided with three input ends and three output ends on both sides, wherein one input end is connected with the output end of the input matching level circuit, and the two input ends receive signals(IN1/IN2) of a differential signal input end and then output two channels of differential signals (OUT1/OUT2). 本发明涉及种宽带全差分低噪声放大器，其特征在于，包括：该放大器分为两级，包括输入匹配级电路和噪声抵消级电路；所述输入匹配级电路，其输入端接收信号输入端的信号(IN1/IN2)，产生相位相反的两路信号，分别通过电容电阻组成的高通滤波器