描述 Description

Intersil CA3089 is a monolithicintegrated circuit that provides all the functions of a comprehensive FM-IF system. The block diagram shows the CA3089 features, which include 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.

Features.

? For FM IF Amplifier Applications in High-Fidelity, Automotive, and Communications Receivers

? Includes: IF Amplifier, Quadrature Detector, AF Preamplifier, and Specific Circuits for AGC, AFC, Muting (Squelch), and Tuning Meter

? Exceptional Limiting Sensitivity at -3dB Point. . . . . . . . . . . . . . . . . . . . . . . . . . . 12μV (Typ)

? Low Distortion: (with Double-Tuned Coil) . . . . . . . . . . . . . . . . .? 0.1 (Typ)

? Single-Coil Tuning Capability

? High Recovered Audio . . . . . . . . . . . . . . . . . .400mV (Typ)

? Provides Specific Signal for Control of Interchannel Muting (Squelch)

? Provides Specific Signal for Direct Drive of a Tuning Meter

? Provides Delayed AGC Voltage for RF Amplifier

? Provides a Specific Circuit for Flexible AFC

? Internal Supply-Voltage Regulators

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