TDA4443

TDA4443 MULTISTANDARD VIDEO IF AMPLIFIER . . . . . . . . . . . . . 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 SIGNAL AMPLITUDE ADJUSTABLE, DELAYED AGC FOR PNP TUNERS DESCRIPTION The TDA4443 is a Video IF amplifier with standard switch for multistandard colour or monochrome TV sets, and VTR’s. DIP16 (Plastic Package) ORDER CODE : TDA4443 PIN CONNECTIONS IF INPUT STANDARD SWITCHING GROUND IF AGC TIME CONSTANT DELAYED TUNER AGC OUTPUT TUNER AGC ADJUST GATING PULSE INPUT REFERENCE LC NETWORK 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 IF INPUT GROUND NOT TO BE CONNECTED SUPPLY VOLTAGE V CC NOT TO BE CONNECTED VIDEO SIGNAL OUTPUT DISCHARGE TIME CONSTANT REFERENCE LC NETWORK 4443-01.EPS December 1992 1/7 TDA4443 BLOCK DIAGRAM VIDEO OUTPUT 11 10 TDA4443 WIDE BAND AMPLIFIER IF INPUT IF INPUT 16 1 VIDEO DEMODULATOR IW 9 8 CONTROL A...