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. 29, 1986
Filed:
Jun. 24, 1985
Dennis K Briefer, Marlboro, MA (US);
Setra Systems, Inc., Acton, MA (US);
Abstract
An oscillator including a non-inverting amplifier coupled in series with an inverting amplifier. A first feedback network couples the output from the non-inverting amplifier to the input of that amplifier by way of a capacitor C. A second feedback network couples the output of the inverting amplifier to the input of the non-inverting amplifier by way of a series connected resistor R, and includes a capacitor coupled between the input of that non-inverting amplifier and a reference potential. A third feedback network generates a feedback signal proportional to the difference between the average voltage at the output of the non-inverting amplifier and the average voltage at the output terminal of the inverting amplifier, and couples that feedback signal to the input of the inverting amplifier.