SU1665536A1

SU1665536A1 - Cathode ray tube raster correction signal driver

Info

Publication number: SU1665536A1
Application number: SU894646589A
Authority: SU
Inventors: Игорь Генадиевич Елизаров; Олег Самуилович Леви
Original assignee: Предприятие П/Я М-5876
Priority date: 1989-01-12
Filing date: 1989-01-12
Publication date: 1991-07-23

Abstract

Изобретение относитс к телевидению. Цель изобретени - повышение точности коррекции растра электронно-лучевой трубки (ЭЛТ) путем формировани сигнала коррекции асимметричных подушкообразных искажений растра ЭЛТ. Пилообразное напр жение частот и полей поступает на первый вход сумматора 1 с первого входа устройства. На второй вход сумматора 1 пилообразное напр жение частот и полей поступает с инвертора 7. С выхода сумматора 1 пилообразное напр жение управл ет работой широтно-импульсного модул тора 5, формирующего импульсы частоты строк, поступающие на второй вход устройства. С помощью формировател 8 импульсов и формировател 9 одиночных импульсов в преобразователе 10 импульсов формируютс параболические импульсы частоты строк требуемой длительности, которые перемножаютс в умножителе 3 с пилообразным напр жением частот и полей. 2 ил.The invention relates to television. The purpose of the invention is to improve the accuracy of the correction of a cathode ray tube (CRT) raster by generating a correction signal for asymmetric pillow distortions of a CRT raster. A sawtooth voltage and field voltage is applied to the first input of the adder 1 from the first input of the device. To the second input of the adder 1, the sawtooth voltage and fields come from the inverter 7. From the output of the adder 1, the sawtooth voltage controls the operation of the pulse-width modulator 5, which generates the frequency pulses of the lines fed to the second input of the device. Using a pulse generator 8 and a single pulse generator 9 in a pulse converter 10, parabolic frequency pulses of rows of the required length are formed, which are multiplied in multiplier 3 with a sawtooth voltage and field frequency. 2 Il.

Description

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Claims

Claim

A device for generating a correction signal for a raster of a cathode ray tube (CRT) containing an adder, the first input of which is the first input of the device, a multiplier whose output is the output of the device, and the first input is connected to the first input of the adder and a pulse converter, characterized in that, with In order to improve the accuracy of correction of a CRT raster by generating a correction signal for asymmetric pincushion distortions of a CRT raster, a pulse-width modulator, an inverter, a pulse shaper, and single pulses, the first input of a pulse-width modulator being the second input of the device, and the output of a pulse-width modulator through series-connected pulse shaper, a single pulse shaper and a pulse converter connected to the second input of the multiplier, the second input of the pulse-width modulator connected to the output of the adder , the second input of which is connected to the output of the inverter, the input of which is connected to the first input of the adder.

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