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:
Aug. 07, 1990
Filed:
Jun. 13, 1989
Applicant:
Inventor:
John R Tavis, Mariposa, CA (US);
Assignee:
Tavis Corporation, Mariposa, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B / ; H03L / ;
U.S. Cl.
CPC ...
331109 ; 331114 ; 3311 / ;
Abstract
An improved control circuit for maintaining constant amplitude of the sinusoidal output signal of an oscillator circuit by synchronously demodulating the signal using a push-pull transistor pair operating in saturation to generate a control signal for comparison with a reference voltage in a direct coupled negative feedback loop to the oscillator. The configuration of the feedback loop provides effectively instantaneous control response to eliminate low frequency modulation propagated internally in the oscillator due to noise generation in circuit components.