Part Number: HA1137W
Function: FM IF System
Package: DIP 16 Pin Type
Manufacturer: Hitachi
Images:
Description
The Hitachi HA1137W is a monolithic integrated circuit developed of the FM IF System in a Hi-Fi stereo tuner set. It includes all those functions necessary for a FM IF housed in a 16-lead, dual-in-line plastic package.
The block diagram shows that the input signal is fed to a three-stage FM IF amplifier/limiter configuration and to a three-stage detector for a tuning meter driver. The detector circuit utilizes a double-balanced quadrature FM detector followed by an audio amplifier and a muting ( squelch ) circuit.
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Function:
1. IF Amplifier
2. Quadrature Dectector
3. Low-noise AF Preamplifier
4. Delayed AGC circuit for Tuner Front End
5. Center Meter Circuit
HA1137W PDF Datasheet
