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:
Dec. 17, 1996
Filed:
Jun. 07, 1995
Applicant:
Inventor:
Timothy G O'Shaughnessy, Blackforest, CO (US);
Assignee:
American Microsystems, Inc., Pocatello, ID (US);
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H03B / ; G05F / ; G05F / ;
U.S. Cl.
CPC ...
331111 ; 331143 ; 331186 ; 327541 ; 327543 ;
Abstract
A low power RC oscillator includes a low power bias circuit and an RC network. The RC network is used to form a time constant equal to the RC product. However, this RC time constant is not used in the manner of a typical RC network to set the frequency of oscillation. Instead, the RC oscillator disclosed herein includes a separate oscillator, such as a voltage-controlled oscillator (VCO), and uses the RC time constant to compare with the oscillator-generated period and to adjust the frequency of the overall RC oscillator circuit in accordance with the comparison. The RC oscillator is self-calibrating.