Patent · US Expired

Method of generating a voltage with a triangular wave form

US5015960A · kind A · utility

0Cited by

2References

9Claims

0Family size

Assignee

Deutsche Thomson-Brandt GmbH · DE

Inventors

Uwe Hartmann · Stuttgart, DE
Fritz Ohnemus · Villingen-Schwenningen, DE

Key dates

Filing date	Apr 28, 1989
Grant date	May 14, 1991
Priority date	—
Expiry date	Apr 28, 2009

Classification

Technology area (CPC H)Electricity
CPC primaryH03K4/06
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A method for generating a voltage with a triangular waveform which is independent of frequency. Two oppositely-phased voltages with sawtooth waveforms are added together in an adding circuit. These two waveforms have different amplitudes, and one of the waveforms has a horizontal section during predetermined intervals of a period. The resulting triangular waveform has points at which the waveform passes through zero, and these points coincide with the points at which the sawtooth waveforms pass through zero also. These points at which the waveforms pass through zero corresponds to 0.degree., 180.degree., and 360.degree. of a waveform cycle for eliminating substantially gullwing errors in television sets. These points correspond to the beginning, center and end of lines in the television sets.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.