Patent ID: 8531242
Filing Date: 2013-09-10
Classification: H03F

Abstract:
1. An operational amplifier, comprising: first and second input terminals, an input voltage being applied to the first input terminal; and an output terminal, the second input terminal being connected to the output terminal, the input voltage applied to the first input terminal being overdriven to have a certain level to be outputted to the output terminal; first and second overdriving units configured to perform an overdriving operation at a rising edge and a falling edge, respectively; a first stage unit comprising the first and second input terminals and the output terminal, the first stage unit configured to provide a first bias current; a first overdriving unit connected to the first stage unit, the first overdriving unit configured to provide an offset current for performing the overdriving operation at the rising edge; and a second overdriving unit connected to the first stage unit, the second overdriving unit configured to provide an offset current for performing the overdriving operation at the falling edge.