Patent ID: 7710162
Filing Date: 2010-05-04
Classification: H03F

Abstract:
1. 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; a feedback input unit configured to control the voltage levels of the first output node and the second output node according to a voltage difference between first and second feedback signals respectively fed back from the first output node and the second output node; a load unit having at least two transistors coupled with each other at their gates to provide the input unit and the feedback unit with current determined by the input unit and the feedback unit, wherein one of the two transistors is diode-connected, the other transistor is coupled to a corresponding one of the first and second output nodes, and voltages loaded at the first and the second output nodes are respectively output as a first output signal and a second output signal; an initialization unit configured to initialize the first and the second output nodes in response to an enable signal; and a bias provider configured to control the activation of the differential amplifier by providing the input unit, the load unit, and the feedback unit with a bias current in response to the enable signal, wherein the input unit includes: