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TDA1054M is produced by SGS Thomson and is a preamplifier with ALC ( Automatic Level Control ) for cassette recorders.
TDA 1054M is a monolithic integrated circuit in a 16-lead dual in-line plastic package. The functions incorporated are:
- Low noise preamplifier
- Automatic Level Constrol system ALC
- High gain equalization amplifier
- Supply voltage rejection facility SVRF
TDA1054 is intended as preamplifier in in cassette tape recorders and players, compressor and expander, dictaphones, Hi-Fi preamplifiers and in wire diffusion receivers.
Here you have the TDA1054 specifications – tda1054 datasheet
This is a dynamic audio compressor which output a constant audio level and can be used for transmitters. It uses a preamplifier with TDA 1054 produced by SGS-ATES. IC1a is a preamplifier stage with a total gain of 50 (1 + R5/R4). IC1b is connected as a amplifier stage with a 400x gain (1 + R11/R10).
The audio compressor power supply has 12V.
