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:
Jun. 06, 1989
Filed:
Jun. 13, 1986
Applicant:
Inventors:
Noboru Takada, Saitama, JP;
Hajime Yokoyama, Saitama, JP;
Assignees:
Toko, Inc., Tokyo, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
455197 ; 455193 ; 455196 ;
Abstract
An electronic tuning circuit for AM receiver is disclosed which is so designed that tracking errors are minimized by increasing the accuracy of constants for tuning coils, oscillation coils and capacitance elements incorporated in an antenna tuning circuit, a high-frequency amplifier circuit and a local oscillator circuit which constitute the electronic tuning circuit. After the electronic tuning circuit has been mounted in place, tracking adjustment is effected at one point of the receiving frequency band, or alternatively no such adjustment is required.