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LM3189

Part Number	LM3189
Manufacturer	National Semiconductor
Description	LM3189 FM IF System
Published	Mar 22, 2005
Detailed Description	LM3189 FM IF System April 1987 LM3189 FM IF System General Description The LM3189N is a monolithic integrated circuit ...
Datasheet	LM3189 PDF File

Overview

LM3189 FM IF System April 1987 LM3189 FM IF System General Description The LM3189N is a monolithic integrated circuit that provides all the functions of a comprehensive FM IF system The block diagram of the LM3189N includes a three stage FM IF amplifier limiter configuration with level detectors for each stage a doubly balanced quadrature FM detector and an audio amplifier that features the optional use of a muting (squelch) circuit The advanced circuit design of the IF system includes desirable deluxe features such as programmable delayed AGC for the RF tuner an AFC drive circuit and an output signal to drive a tuning meter and or provide stereo switching logic In addition internal power ...

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