Patent ID: 8089320

Claim:
A differential amplifier (DA), comprising: a first inverter; a second inverter; a current supply controller; and a current drain controller, wherein the first inverter inverts a first input signal applied to the first inverter and outputs the inverted first input signal to the current supply controller and the current drain controller, wherein second inverter inverts the first input signal applied to the second inverter and outputs the inverted first input signal as an output signal of the DA, wherein the current supply controller supplies current to the first and second inverters in response to the inverted first input signal output from the first inverter during a first period, wherein the current drain controller drains current from the first and second inverters in response to the inverted first input signal output from the first inverter during a second period, and wherein the output signal of the DA and the first input signal have differential phases with respect to each other and oscillate between logic high and low levels during the first period and the second period.