描述 Description

Overview
The LA7850 is a sync deflection circuit IC dedicated to CRT display use. It can be connected to the LA7832, 7833, 7837, 7838 (for vertical output use) to form a sync deflection circuit that meets every requirement for CRT display use.

特性 Features

? The horizontal oscillation frequency can be adjusted stably from 15kHz to 100kHz.
? The horizontal display can be shifted right/left.
? The horizontal/vertical sync input can be used intact regardless of the difference in pulse polarity and pulse width.
? The AFC feedback sawtooth wave can be obtained by simply applying a flyback pulse to the IC as a trigger
pulse.
? Any duty of the horizontal pulse can be set.
? Good vertical linearity because DC bias at vertical output stage is subject to sampling control within retrace time.On-Chip Functions
[Horizontal Block]
? AFC
? Horizontal OSC
? X-ray protector
? Horizontal phase shift
? AFC sawtooth wave generator
? Horizontal pulse duty setting
[Vertical Block]
?
? Vertical OSC
?
? Vertical sawtooth wave generator
?
? Sampling type DC voltage control