Patent ID: 6380801
Filing Date: 2002-04-30
Classification: H03F

Abstract:
An operational amplifier, comprising:two differential input stages, a first one of the stages comprising a pair of first input transistors and another one of such stages comprising a pair of second input transistors, such second input transistors being complementary in type to the first input transistors; a comparator fed by a sense signal and a reference signal, such sense signal being related to at least one of a non-inverting and an inverting input signal fed to the operational amplifier, such comparator producing a control signal in accordance with a difference between the sense signal and the reference signal; and a switching network, responsive to the control signal, for inhibiting coupling of the first differential input stage to an output of the operational amplifier when the first differential input stage is partially operational and for inhibiting coupling of the second differential input stage to the output of the operational amplifier when the second differential input stage is partially operational.