Patent ID: 8937508
Filing Date: 2015-01-20
Classification: H03F

Abstract:
1. A differential amplifier comprising: a first pair of complementary transistors with first control terminals coupled to a first input node of the differential amplifier and first driving terminals coupled to a first output node of the differential amplifier for driving a load; a second pair of complementary transistors with second control terminals coupled to a second input node of the differential amplifier and second driving terminals coupled to a second output node of the differential amplifier for driving the load; a current source configured to maintain a substantially constant total current flow through the first pair of complementary transistors and the second pair of complementary transistors; and a reference voltage generator configured to generate a reference voltage based on a third pair of complementary transistors that is diode-connected for maintaining a common mode voltage level at the first output node and the second output node with reference to the reference voltage.