Patent ID: 6218887
Filing Date: 2001-04-17
Classification: H03F,H03K

Abstract:
A multiplexer comprising:a first switch responsive to complementary control signals, said first switch having a conductive state and a nonconductive state;a first differential amplifier having a first noninverting node connected to receive a first input signal and a first inverting node connected to receive a feedback signal, said first differential amplifier operating in response to said first switch being in said conductive state to produce a first signal corresponding to said first input signal;a second switch responsive to said complementary control signals, said second switch having a conductive state and a nonconductive state;a second differential amplifier having a second noninverting node connected to receive a second input signal and a second inverting node connected to receive said feedback signal, said second differential amplifier operating in response to said second switch being in said conductive state to produce a second signal corresponding to said second input signal; adan output stage for outputting the first signal from said first differential amplifier when said first switch is in said conductive state or the second signal from said second differential amplifier when said second switch is in said conductive state, said feedback signal being the output of said output stage, wherein the first and second switches, the first and second differential amplifiers, and the output stage are included in an operational amplifier.