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:
Oct. 25, 1988
Filed:
Jun. 23, 1986
Seiji Sakashita, Yawata, JP;
Kiyotake Fukui, Settsu, JP;
Matsushita Electric Industrial Co. Ltd., Osaka, JP;
Abstract
A signal receiver generates a reference signal that sweeps frequencies of desired channel bands, and then feeds the reference signal to an input terminal of receiver unit via a signal-switching circuit that performs switching of the desired-channel signal and the reference signal. The signal receiver then detects the signal strength present in plural frequencies of intermediate frequencies delivered to an output terminal of the reference signal, and after storing detected signal data in a memory, the signal receiver compares the detected signal data to desired frequency characteristics. Then, the signal receiver determines tuning voltages of respective tuning circuits so that the differences which arose from the comparison can be minimized. After determining the tuning voltages, these voltages are delivered to respective tuning circuits, and then a switching operation between the reference signal and the desired channel signal is executed before the signal receiver eventually receives the switched signal.