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