Title: Superheterodyne receiver having distortion reducing circuitry

Abstract: A superheterodyne receiver having means for detecting distortion in the intermediate frequency signal and for controlling the local oscillator frequency in accordance with the detected distortion to thereby minimize the distortion. Means are also disclosed for facilitating the use of a tuning indicator with the receiver, for enhancing the manipulability of a tuning knob of the receiver, for minimizing the effect of noise and interference on the receiver and for compensating for distortion present in the distortion detecting means.

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Inventors: Naito, Michinori (Tokyo, JP)

Application Number: 017815
Filing Date: 1979-03-05
Publication_date: 1980-12-02
Assignee: Trio Kabushiki Kaisha (Tokyo, JP)
Primary Class(es): 455/154.1 455/173.1, 455/196.1, 455/208
Other Classes:
US Patent Ref:

2677049	Apr, 1954	Rogers	325/346.
3069625	Dec, 1962	Morita et al.	325/346.
3160815	Dec, 1964	Ford et al.	325/346.
3189825	Jun, 1965	Lahti et al.	325/346.
3371281	Feb, 1968	Powell	325/346.
3673499	Jun, 1972	Avins	325/344.

Other Refs:
Primary Examiner: Ng, Jin F.
Assistant Examiner:
Attorney: Ferguson, Jr.; Gerald J., Baker; Joseph J.