Output switching circuit for TV receiver

摘要

A circuit for switching over an output between two high-frequency (HF) signal inputs comprising diodes in the signal paths (1, 2) between the inputs and outputs and which controlled switching diodes are alternately made conducting and non-conducting by a switching voltage (Us), claims a simplified design layout which meets the requirement of low forward attenuation and high reverse attenuation, on account of having a series circuit of two switching diodes (D1, D2 or D3, D4) in each signal path (1, 2), with the centre point (a, b) of the series circuit earthed via a capacitor (C5; C6).