Patent ID: 6927629
Filing Date: 2005-08-09
Classification: H03F

Abstract:
1. A differential amplifier that receives first and second input signals and generates first and second output signals, the differential amplifier comprising: a first differential converter including a first grounded emitter amplifier that receives the first input signal and generates a first differential output signal, and a first grounded base amplifier that receives the first input signal and generates a second differential output signal; and a second differential converter including a second grounded emitter amplifier that receives the second input signal and generates a third differential output signal, and a second grounded base amplifier that receives the second input signal and generates a fourth differential output signal; wherein the first output signal is generated by coupling the first differential output signal and the fourth differential output signal, and the second output signal is generated by coupling the second differential output signal and the third differential output signal, wherein the first grounded emitter amplifier includes: a first transistor, the first grounded base amplifier includes: the second grounded emitter amplifier includes: a third transistor, the second grounded base amplifier includes: