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LM3089N

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LM3089N 数据手册

September 1992

LM3089 FM Receiver IF System

Four internal carrier level detectors provide delayed

AGC signal to tuner, IF level meter drive current and in-

terchannel mute control

General Description

The LM3089 has been designed to provide all the major

functions required for modern FM IF designs of automotive,

high-fidelity and communications receivers.

AFC amplifier provides AFC current for tuner and/or

center tuning meters

Improved operating and temperature performance, es-

pecially when using high Q quadrature coils in narrow

band FM communications receivers

Features

Three stage IF amplifier/limiter provides 12 mV (typ)

3 dB limiting sensitivity

No mute circuit latchup problems

Balanced product detector and audio amplifier provide

400 mV (typ) of recovered audio with distortion as low

as 0.1% with proper external coil designs.

A direct replacement for CA3089E

Connection Diagram

Dual-In-Line Package

TL/H/7149–2

Top View

Order Number LM3089N

See NS Package Number N16E

1995 National Semiconductor Corporation

TL/H/7149

RRD-B30M115/Printed in U. S. A.

12 3 4 5 6

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