Receiver for fm signals with transmitter status code storage

Abstract

In a receiver for FM-signals, more specifically a car radio, the tuning data for those FM-transmitters which transmit the same program are stored in addressable memory locations of a first memory field. In order to be continuously tuned to the best receivable transmitter a second memory field is provided, which comprises in each of the addressable locations a status code word which is unambiguously associated with a tuning datum. These status code words are produced by a status circuit to which the intermediate-frequency signal is applied. A control circuit starts at regular intervals an up-date cycle during which the receiver is tuned to a number of transmitters whose tuning data are stored in the first memory field. In each tuning action a new status code word is determined to replace the original status code word. Thereafter the new status code words are checked against a predetermined criterion and the receiver is tuned to that transmitter whose associated status code word satisfies that criterion to the highest extent.