Parallel-resistance feedback differential low-noise amplifier

• Main Authors: ZHOU RENJIE, GAN YEBING, MA CHENGYAN, DUAN LIAN, HE XIAOFENG
• Format: Patent
• Language: Chinese; English
• Published: 21.11.2012
• Subjects: AMPLIFIERS; BASIC ELECTRONIC CIRCUITRY; ELECTRICITY

The invention relates to a parallel-resistance feedback differential low-noise amplifier, which comprises a main amplification circuit. The main amplification circuit comprises a first MOS (metal oxide semiconductor) tube, a second MOS tube, a third MOS tube and a fourth MOS tube, a grid end of the first MOS tube is connected with a first differential input end through a first input matching network, the second MOS tube is connected with a second differential input end through a second input matching network, a drain end of the first MOS tube M1 is connected with the grid end of the first MOS tube through a first parallel-resistance feedback branch, and a drain end of the second MOS tube is connected with a grid end of the second MOS tube through a second parallel-resistance feedback branch; the first parallel-resistance feedback branch comprises a first resistor and a first capacitor connected with the first resistor in series; and the second parallel-resistance feedback branch comprises a second resistor an