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:
Apr. 02, 1991
Filed:
Jul. 19, 1989
Applicant:
Inventors:
Assignee:
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B / ;
U.S. Cl.
CPC ...
3311 / ; 331158 ; 331176 ;
Abstract
A temperature-compensated quartz crystal oscillator has two or more temperature compensating units. The first temperature compensating unit compensates the frequency-temperature characteristics of the oscillator over its rated temperature range. The other temperature compensating units further independently compensate the frequency-temperature characteristics of the oscillator within respective specific temperature regions of the compensated frequency-temperature characteristics to obtain desired frequency-temperature characteristics for the crystal oscillator.