Abstract: A channel discriminator circuit is specifically adaptable for use in association with a radio receiver in which DC voltage signals are generated which are proportional to the FM signals received by the radio receiver and an inhibit circuit will generate an inhibit signal denoting the reception of FM signals above a predetermined detection threshold corresponding to an assigned carrier frequency. The channel discriminator circuit will determine whether the FM signals received are centered within a predetermined band width corresponding to the assigned carrier frequency by comparing the DC voltage signal generated with upper and lower reference voltage limits generated by a potentiometer network and will cause the inhibit circuit to generate an inhibit signal only if the DC voltage representing the FM signal received is within the predetermined limits established by the potentiometer network.