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:
Mar. 15, 1983
Filed:
Sep. 17, 1980
Applicant:
Inventors:
Tetsuro Konno, Tokyo, JP;
Tetsuro Konno, Tokyo, JP;
Assignee:
Seikosha Co., Ltd., , JP;
Primary Examiner:
Int. Cl.
CPC ...
H03B / ; H03L / ;
U.S. Cl.
CPC ...
331158 ; 310315 ; 310366 ; 331163 ; 331176 ; 3311 / ;
Abstract
An oscillator comprises plural electrodes formed on a piezoelectric vibrator, and the oscillation frequency is controlled by varying the duty factor of the pulses for switching an effective electrode area of the plural electrodes. The frequency-temperature characteristic of the oscillator is compensated by varying the duty factor of the switching pulses according to temperature variations. No trimmer condenser is needed, and the frequency-temperature characteristic is compensated over a wide temperature range.