LM3089中文资料FM Receiver IF System数据手册TI规格书

描述 Description

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.

特性 Features

■ Three stage IF amplifier/limiter provides 12 mV (typ)
   b3 dB limiting sensitivity
■ 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.
■ Four internal carrier level detectors provide delayed
   AGC signal to tuner, IF level meter drive current and in
   terchannel mute control
■ 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
■ No mute circuit latchup problems
■ A direct replacement for CA3089E