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MC1490 - WIDEBAND AMPLIFIER WITH AGC

General Description

OF SPEECH COMPRESSOR The amplifier drives the base of a PNP transistor operating common

emitter with a voltage gain of approximately 20.

The control R1 varies the quiescent Q point of this transistor so that varying amounts of signal exceed the level Vr.

Key Features

  • 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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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Order this document by MC1490/D MC1490 RF/IF/Audio Amplifier The MC1490 is an integrated circuit featuring wide–range AGC for use in RF/IF amplifiers and audio amplifiers over the temperature range, –40° to +85°C. • High Power Gain: 50 dB Typ at 10 MHz 45 dB Typ at 60 MHz 35 dB Typ at 100 MHz • Wide Range AGC: 60 dB Min, DC to 60 MHz WIDEBAND AMPLIFIER WITH AGC SEMICONDUCTOR TECHNICAL DATA • • 6.0 V to 15 V Operation, Single Polarity Supply See MC1350D for Surface Mount MAXIMUM RATINGS (TA = +25°C, unless otherwise noted.) Rating Power Supply Voltage AGC Supply Input Differential Voltage Operating Temperature Range Storage Temperature Range Junction Temperature Symbol VCC VAGC VID TA Tstg TJ Value +18 VCC 5.