MC1490 - WIDEBAND AMPLIFIER WITH AGC

Motorola

Datasheet Details

OF SPEECH COMPRESSOR The amplifier drives the base of a PNP transistor operating common emitter with a voltage gain of approximately 20.

re 24. Speech Compressor +12 V 25 µF 0.001 1.0 k 1.0 k 2 5 15 µF Input 4 6 15 µF R3 15 k 7 1 MC1490P 3 +12 V +12 V 8 10 µF 10 µF Output +12 V R2 Q2 2N3904 4.7 k 150 k Cx Rx 220 Q1 2N3906 D1 6.8 k 2.2 k Vr 33 k R1 100 k.

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Published: Jun 15, 2005 |