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Amplifier Feedback Functionality

Which share common-mode amplifiers and differential amplifier input stage current mirror and the output load. So, on the one hand to reduce power consumption; One hand and ensure common-mode amplifiers and differential-mode amplifiers on the AC characteristics remain consistent. Because of common-mode amplifier output stage and differential-mode amplifier output stage can be fully shared, capacitor circuit is the same. Frequency characteristic is stable as long as the differential amplifier, common-mode feedback is stable. This common mode feedback circuit allows the fully differential operational amplifier can be like a single-ended output operational amplifier design, regardless of the common-mode feedback circuit effects on fully differential amplifier