OPERATIONAL AMPLIFIER FOR INCLUDING AN OVER DRIVING CIRCUIT CAPABLE OF ARRIVING TO A TARGET VOLTAGE WITHIN AN OPERATING TIME

摘要

PURPOSE: An operational amplifier for including an over driving circuit is provided to arrive to a target voltage within an operating time by outputting a higher voltage than a target voltage when an RC delay time is long.;CONSTITUTION: A first stage part(100) offers a bias current by including two input terminals and one output terminal. A first overdriving part(200) offers an offset current for overdriving motion in a rising edge. A second overdriving part(300) offers the offset current for the overdriving motion in a falling edge. A second stage part(400) is designed with a circuit like a common source amplifier. A buffer part(500) is formed with a CMOS(Complementary Metal Oxide Semiconductor) type transistor including a NMOS(N-channel metal oxide semiconductor) transistor(N15) and a PMOS(P-channel metal oxide semiconductor) transistor(P15).;COPYRIGHT KIPO 2012