Line receiver circuit having termination impedances with transmission gates connected in parallel

摘要

A line receiver circuit featuring an integrated input amplifier circuit having a non-inverting input terminal and an inverting input terminal for connection with a transmission line. The circuit features a line termination impedance means for terminating the characteristic impedance of the transmission line with the input amplifier circuit and the line termination impedance means integrated on a common semiconductor substrate. The line termination impedance means features a series connection of a plurality of impedances where at least one of the impedances has a transmission gate connected in parallel. The transmission gates feature a parallel connection of an N-channel MOSFET and a P-channel MOSFET where the gate of the N-channel MOSFET is connected to receive a transmission control signal, and the gate of the P-channel MOSFET is connected to receive the inverted transmission control signal.