Abstract text

The present invention relates to a differential feedback amplifier circuit with cross coupled capacitors. Wherein, the first and second input terminals of a source follower are respectively coupled to the first and second output terminals of a differential amplifier, and a resistor is respectively coupled between the first output terminal of the source follower and the first input terminal of the differential amplifier and between the second output terminal of the source follower and the second input terminal of the differential amplifier in order to form a feedback loop. In addition, a capacitor is respectively coupled between the first end current source gate of the source follower and the second input terminal of the source follower and between the second end current source gate of the source follower and the first input terminal of the source follower, so as to improve the circuit gain and bandwidth.