TDA4452

TDA4452 Video IF Amplifier for Multistandard TV Receiver and VTR Appliances Technology: Bipolar 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 Expanded video frequency response allows the demodulation of amplitude modulated MAC signals D High input sensitivity D Minimal intermodulation distortions D Small differential error D D D D D D Constant input impedance Video output voltage with narrow tolerance Video input/output for insertion of external sound trap VTR input/output with video switch Adjustable, delayed AGC for the tuner ESD protected Case: DIP18 Figure 1. Block diagram TELEFUNKEN Semiconductors Rev. A1, 15-Aug-96 1 (11) TDA4452 Pin 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 contr...