Description:

The NTE1632 separates the horizontal and vertical sync pulses from the composite TV video signal and uses them to synchronize vertical and horizontal oscillators. The NTE1632 is supplied in a 18−Lead DIP type package.

Features:

 Horizontal sync separator & noise inverter

 Horizontal oscillator

 Horizontal phase detector (sync to oscillator)

 Horizontal output stage

 Inhibit of horizontal phase detector & video transmitter identification circuit during vertical oscillator flyback

 Stabilizer & supply circuit for staring the horizontal oscillator & output stage directly from the mains rectifier

 Duty factor of horizontal output pulse is 50% when flyback pulse is absent

 Vertical sync separator

 Vertical comparator with internal 3% precorrection circuit for vertical oscillator/sawtooth generator

 Vertical driver stage

 Vertical blanking pulse generator with external adjustment of pulse duration (50Hz: 21 lines: 60Hz: 17 lines)

 Vertical guard circuit

 Bandgap 6.5V reference voltage for vertical oscillator & comparator

 Synchronized vertical oscillator/sawtooth generator (synchronization inhibited when no video transmitter is detected)

 Time constant switch for phase detector (fast time constant during catching)

 Slow time constant for noise only conditions

 Time constant externally switchable (e.g. fast for VCR)

 Second phase detector for storage compensation of horizontal deflection stage

 Sandcastle pulse generator (3 levels)

 Video transmitter identification circuit


Internal circuit for 3% parabolic precorrection of the oscillator/sawtooth generator. Comparator supplied with precorrected sawtooth & external feedback input