TDA2579C View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

TDA2579C

Synchronization circuit with synchronized vertical divider system for 60 Hz

Philips Electronics 

Philips Semiconductors

Synchronization circuit with synchronized

vertical divider system for 60 Hz

Preliminary specification

TDA2579C

video input

signal V5-9

separated

horizontal

sync pulse

ϕ 1 detector

reference

ϕ1 detector

output I8

horizontal

oscillator

sawtooth

horizontal

flyback

pulse

internal

gating

pulse

coincidence

detector

output I 18

ϕ 2 detector

reference

external

horizontal

flyback

pulse V12-9

ϕ 2 detector

output I14

horizontal

output

signal V11-9

sandcastle

output

signal V17-9

Two counter pulses equals one video line.

January 1994

4.7 µs

0.3 µs

ϕ 1 reference level

ϕ 2 reference level

3.75 µs 3.75 µs

7.5 µs

2.5 µs

storage time

horizontal

deflection stage

1/2 t FB

1/2 t FB

t FB

switching level

0V

29 µs

0.2 µs

10.4 V

6 µs

tP

12 µs

divider in search window mode

60 Hz: 34 clock pulses

other divider modes

60 Hz: 42 clock pulses

4.5 V

2.5 V

0.7 V

MGA794

Fig.5 Timing diagram.

17

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