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:
Jun. 29, 1982
Filed:
Feb. 13, 1980
Walter Guggenbuhl, Stafa, CH;
Mathis Halder, Baar, CH;
LGZ Landis & Gyr Zug AG, Zug, CH;
Abstract
A pulse-width modulator circuit includes a pulse-width modulator which has an input for a low-frequency modulation signal and an input for a carrier signal, a carrier signal generator which has an output connected to the carrier signal input of the pulse-width modulator for providing a carrier frequency, a buffer stage postcoupled to the pulse-width modulator, an output filter postcoupled to the pulse-width modulator, including a relatively narrow-band resonant circuit for damping the carrier frequency, and a regulating device forming a feedback path between the resonant circuit and the carrier signal generator for maintaining the carrier frequency substantially at the resonance frequency of the resonant circuit.