Patent ID: 8189403

Claim:
A high speed linear differential amplifier, comprising: a differential amplifier configured to amplify a voltage difference between a first input signal and a second input signal and to generate an output signal and; a control signal generator that includes a replica differential amplifier and configured to generate a control signal that controls a gain of the differential amplifier and of the replica differential amplifier, wherein the differential amplifier comprises: a first input unit connected between a first power supply voltage and a common node, and configured to receive the control signal and the first input signal and to output an inverted first input signal to a first output node; a second input unit connected between the first power supply voltage and the common node in parallel with the first input unit, and configured to receive the control signal and the second input signal and to output an inverted second input signal to a second output node; and a driving unit including a driving transistor connected between the common node and a second power supply voltage, and configured to activate the differential amplifier in response to a bias voltage applied to a gate of the driving transistor.