TDA4481-D

www.DataSheet4U.com TELEFUNKEN Semiconductors TDA4481-D Multistandard quasi parallel-sound processor for Mono-TV-Sets Technology: Bipolar Features D High signal sensitivity D High signal to noise ratio D Easy alignment of the multistandard filters D Converter for different intercarrier frequencies D AF output level matched to SIMAVELEC condition D Few external components D Alignment free AM demodulator for standard L D Standardized SCART interface D Standard-, SCART- and Mute-switch TTL compatible D AF attenuator D ESD protected Case: 20-pin dual inline plastic w w w a D . Rev. A1: 23.02.1995 S a t e e h U 4 t m o .c Figure 1 Block diagram 1 (10) www.DataSheet4U.com TDA4481-D Pin Configuration Pin 1–2 3 4 5 6 7 8 9 10 Function Picture-IF-carrier input SCART-switch AGC storage capacitor SCART-AF input Standard switch AF output (controlled) Volume control voltage SCART-AF output VC0 tank circuit Pin 11 12–13 14 15 16 17 18–19 20 TELEFUNKEN Semiconductors Function Ground FM demod. circuit 5.5 MHz FM deemphasis capacitor Intercarrier output 5.5 MHz Supply voltage Intercarrier input 5.5 MHz and muting Sound-IF-carrier input not connected Description This circuit configuration permits high-quality processing of audio carriers for all standards, providing separate inputs for the video and audio carriers. The audio carrier signal (FM or AM) is passed to two multiplying mixer arrangements via a 3-stage variable wide-band amplifier with levelled output signals. One mi...