Patent ID: 8081015

Claim:
A differential amplifier, comprising: an input unit configured to control voltage levels of a first output node and a second output node according to a voltage difference between a first input signal and a second input signal; first and second load units, each load unit configured to have two transistors coupled with each other at their gates, wherein one of the two transistors is diode-connected and the other transistor is coupled to a corresponding one of the first and second output nodes; a first feedback unit configured to control the voltage level of the second output node in response to a first feedback signal fed back from the first output node; a second feedback unit configured to be coupled to a diode-connected node of the first load unit and to operate in response to a second feedback signal from the second output node; a third feedback unit configured to be coupled to a diode-connected node of the second load unit and to operate in response to the first feedback signal; and a fourth feedback unit configured to control the voltage level of the first output node in response to the second feedback signal.