Daewoo 2898ST Service Manual page 38

TDA4445B (Quasi Parallel Sound Processor)
(1) Features
• Very high input sensitivity
• Excellent signal to noise ratio
• Fast averaged AGC
• IF amplifier can be switched off for VTR mode
• Output signal stabilized against supply voltage variations
• Very few external components
• Targeting bistandard applications
• Low AM distortion
(2) General Description
The TDA4445B is quasi parallel sound processor with quadrature intercarrier demodulator.
(3)Block Diagram
(4)Pin Description
PIN DESCRIPTION
1, 16 IF input
3 IF AGC time constant
8, 9 Tuned circuit
11 Supply voltage
12 Sound-IF-output
13 Ground
2,4,7,10
not be connected
14,15
5 Average capacitor
6 AF output
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