具有共模反馈控制电路的反相伪全差分放大器

摘要

Disclosed are an inverting pseudo-fully differential amplifier having a common-mode feedback control circuit, and a method for keeping an output common-mode level stable. The inverting pseudo-fully differential amplifier comprises a pseudo-fully differential operational circuit and the common-mode feedback control circuit. The pseudo-fully differential operational circuit comprises inverter amplifiers (2) and (3) that respectively comprise a first feedback control terminal and a second feedback control terminal. The input end of the common-mode feedback control circuit is separately connected with the output ends of the inverter amplifiers (2) and (3), and is configured to detect the common-mode output voltage of the inverter amplifiers (2) and (3); the output end of the common-mode feedback control circuit is separately connected with the first feedback control terminal and the second feedback control terminal, and is configured to form common-mode feedback on the inverter amplifiers (2) and (3) so as to keep the common-mode output level stable.