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:
Jul. 20, 1982
Filed:
Sep. 14, 1979
Applicant:
Inventor:
Jeffrey R Teza, Houston, TX (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
331111 ; 3311 / ;
Abstract
A method and apparatus for producing near constant duty cycle over a wide range operating voltage by connecting clamping transistors across critical timing capacitors so as to eliminate undesirable charge injection in MOS and CMOS oscillator systems. In an oscillator in which two inverters are cross-coupled through timing capacitors, each timing capacitor is shunted by a clamping transistor controlled by the output from one of the inverters. The oscillator may be used in a hand-held calculator.