The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 1988
Filed:
Mar. 27, 1987
Tamaki Ohashi, Tokyo, JP;
Toshiyuki Matsuda, Kawasaki, JP;
Nihon Technical Kabushiki Kaisha, Tokyo, JP;
Abstract
A radio receiving circuit provided with a search tuning mechanism. A broadcasting radiowave signal is received during a search tuning operation, and a shift amount of frequency produced in frequency of an intermediate frequency amplifier output is experimentally determined within an inertia self-travelling time interval search tuning mechanism due to the mechanical inertia thereof from the moment at which a drive force applied to the search tuning mechanism is interrupted to the time when the mechanism temporarily positively stops its function. The drive force applied to the search tuning mechanism is interrupted at a frequency deviated by the shift amount in advance from a center frequency of a pass band width of the intermediate frequency amplifier circuit, whereby after the mechanism has self-travelled due to its own mechanical inertia force and when tuned to the center frequency of the received radiowave signal, the search tuning operation is suspended.