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