DESCRIPTION

The TDA4443 is a Video IF amplifier with standard switch for multistandardcolour or monochrome TV sets, and VTR’s.

■ SWITCHING OFF THE IF AMPLIFIER WHEN OPERATING IN VTR MODE

■ DEMODULATION OF NEGATIVE OR POSITIVE IF SIGNALS. THE OUTPUT REMAINS ON THE SAME POLARITY IN EVERY CASE

■ IF AGC AUTOMATICALLY ADJUSTED TO THE ACTUAL STANDARD

■ TWO AGC POSSIBILITIES FOR B/G MODE : 1. GATED AGC 2. UNGATED AGC ON SYNC. LEVEL AND CONTROLLED DISCHARGE DEPENDENT ON THE AVERAGE SIGNAL LEVEL FOR VTR AND PERI TV APPLICATIONS FOR STANDARD L : FAST AGC ON PEAK WHITE BY CONTROLLED DISCHARGE

■ POSITIVE OR NEGATIVE GATING PULSE

■ EXTREMELY HIGH INPUT SENSITIVITY

■ LOW DIFFERENTIAL DISTORTION

■ CONSTANT INPUT IMPEDANCE

■ VERY HIGH SUPPLY VOLTAGE REJECTION

■ FEW EXTERNAL COMPONENTS

■ LOW IMPEDANCE VIDEO OUTPUT

■ SMALL TOLERANCES OF THE FIXED VIDEO SIGNALAMPLITUDE

■ ADJUSTABLE, DELAYED AGC FOR PNP TUNERS