Antenna switching circuit for a diversity receiver.

摘要

An antenna switching circuit for a diversity receiver comprising at least two antenna connecting terminals (INA1, INA2) ; an FM receiving signal supply unit (OUT1) for supplying an FM receiver with signals received by an antenna and fed to the antenna connecting terminals through switching elements; and an AM receiving signal supply unit (OUT2) which utilizes one of the antenna connecting terminals (INA2) as an FM/AM common terminal to supply an AM receiver with signals received by the antenna and fed to this common terminal. The antenna switching circuit has a low cut filter (30) arranged between the common terminal (INA2) and the switching element. The provision of the low cut filter permits the AM receiver to maintain a favourable receiving condition without being disturbed even if high-intensity input FM signals at frequencies close to each other are received from the respective antenna connecting terminals while receiving AM broadcast waves. <IMAGE>