TELEFUNKEN Semiconductors

TDA4439

Rev. A1: 14.09.1995

1 (7)

Video IF Amplifier for Multistandard TV and VTR

Technology: Bipolar

Features

D Standard B/G-L suitable, processes negatively and

positively modulated IF-signals with equal polarity of

the output signal

D Ultra white inverter and ultra black limiter for reduc-

ing transmission interference

D Internally noise protected gain control, no flyback

pulses required

D Expanded video frequency response allows the de-

modulation of amplitude modulated MAC signals

D High input sensitivity

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 The direction of the AFC curve is selectable indepen-

dently from the standard switch

Figure 1. Block diagram