Title：Transconductance amplifier and high-robustness mixer circuit
Country：China
Patent No.：201410157923.8
Legal Status：Authorized
Inventor：Baoyong Chi, Xinwang Zhang, Zehong Zhang, Zhihua Wang
Assignee：Tsinghua University
Address：Tsinghua University,Haidian District Beijing 100084, China
Filing Date：2014-04-18
Issue Date：2017-11-24
Abstract：
The invention discloses a transconductance amplifier and a high-robustness mixer circuit and relates to the technical field of wireless communication. The transconductance amplifier comprises a differential mode circuit, a common mode feedback circuit and a common mode phase margin compensating circuit. The differential mode circuit is used for converting an input radio-frequency voltage signal to a radio-frequency current signal; the common mode feedback circuit is used for counteracting a differential mode component of the radio-frequency voltage signal so as to generate a common-mode voltage signal; the common mode phase margin compensating circuit is used for improving the phase margin of the common-mode voltage signal. The transconductance amplifier of the invention improves the phase margin of the common-mode voltage signal by arranging the common mode phase margin compensating circuit so as to weaken the influence of pre-stage circuit output impedance to the phase margin of a common-mode feedback loop in the transconductance amplifier.
Patent Certificate：
PDF/Jpg