Patent · US Expired

Amplifier with a tuned output transformer

US5299009A · kind A · utility

0Cited by

3References

4Claims

0Family size

Assignee

Deutsche Thomson-Brandt GmbH · DE

Inventors

Martin Laufe · Villingen-Schwenningen, DE
Fritz Ohnemus · Villingen-Schwenningen, DE

Key dates

Filing date	Jul 17, 1992
Grant date	Mar 29, 1994
Priority date	—
Expiry date	Jul 17, 2012

Classification

Technology area (CPC H)Electricity
CPC primaryH04N3/233
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A reverse feedback amplifier which generates a correction current having two oscillations per line period is used to eliminate geometric distortions on the screen on a television kinescope. The reverse feedback amplifier includes an output transistor, a resonance transformer and a feedback network. An improvement of the amplifier includes a switch and a resistor for decreasing the output voltage of the reverse feedback amplifier during the scanning of the center portion of the screen.

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