Patent ID: 8970301
Filing Date: 2015-03-03
Classification: H03F

Abstract:
1. An amplifier comprising: an input circuit comprising an emitter-coupled differential transistor pair configured to receive a first input signal and a first compensation current at a first input terminal and a second input signal and a second compensation current at a second input terminal; a first current source transistor comprising a collector electrically coupled to emitters of the emitter-coupled differential transistor pair, and an emitter electrically connected to a first terminal of a resistor; a local amplifier comprising a first input electrically connected to the first terminal of the resistor, and a second input receiving a first voltage; a first current buffer transistor comprising a base electrically connected to an output of the local amplifier, an emitter electrically connected to a base of the current source transistor, and a collector configured to provide a third compensation current; and a current mirror configured to receive the third compensation current and to provide the first compensation current and the second compensation current.