Semiconductor Group

2

TCA 785

Functional Description

The synchronization signal is obtained via a high-ohmic resistance from the line voltage

synchronization register.

For every half wave, a positive pulse of approx. 30

to ground, pulses with a duration between

Outputs

and

supply the inverse signals of Q 1 and Q 2.

A signal of

A signal which corresponds to the NOR link of Q 1 and Q 2 is available at output Q Z (pin 7).

The inhibit input can be used to disable outputs Q1, Q2 and

,

.

Pin 13 can be used to extend the outputs

and

to full pulse length (180˚ –

Q 1

Q 2

Q 1

Q 2

Q 1

Q 2

Block Diagram