Automatic transmitter search and fine tuning circuit for FM receiver, generates control signal for controlling tuning voltage when frequency control signal deviates from reference signal

摘要

A comparator (20) compares frequency control signal (Vafc) and reference signal (Vref) and generates control signal (R), when signal (Vafc) deviates from reference signal. The control signal controls tuning voltage (VT) output generated by generator. Independent claims are also included for the following: (a) Receiver device; (b) Radio headphone; (c) Radio loudspeaker; (d) Automatic transmitter searching method.