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TDA4452 Datasheet Video If Amplifier For Multistandard Tv Receiver And Vtr Appliances

Manufacturer: TEMIC Semiconductors (now Microchip)

Overview: TDA4452 Video IF Amplifier for Multistandard TV Receiver and VTR Appliances Technology:.

General Description

Pin 1,18 2 3 4 5 6 7 Function IF input Video switch control VTR input, 1 VPP VTR output, 2 VPP (inverted) Supply voltage VS Video output, 2 VPP Video input, after sound trap, 2 VPP Pin 8,17 9 10,11 12 13 14 15 16 Function Ground Video output, 3 VPP from demodulator Demodulator circuit standard switch B/G-L Average capacitor standard L Tuner AGC take over AGC (tuner control) IF AGC storage capacitor Circuit Description The following functional units are integrated in this circuit combination for processing multi standard television IF signals: The IF signal is supplied to the synchronous demodulator via a three-stage gain controlled wideband amplifier.

A level detector limits the output voltage of the wideband amplifier in the event of overdrive.

The required switching carrier for the demodulator is obtained from the IF signal of the wideband amplifier by means

Key Features

  • D Standard B/G-L suitable, processes negatively and positively modulated IF-signals with equal polarity of the output signal D Fast AGC by controlled discharge of the AGC capacitor D Ultra white inverter and ultrablack limiter for reducing transmission interference D Standard L mode: AGC acting on peak white level, capacitor discharge control by averaged video signal Standard B/G: AGC acting on the sync. pulse peak D Internally noise protected gain control, no flyback pulses required D Expa.

TDA4452 Distributor

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TDA4453 Video IF Amplifier for Multistandard TV Receiver and VTR Appliances
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