LM1865 Advanced FM IF System

LM1865 Advanced FM IF System

Reduced external component cost improved performance and additonal functions are key features to the LM1865 FM IF system The LM1865 is designed for use in electronically tuned radio applications It contains both deviation and signal level stop circuitry in addition to an open-collector stop output T.

Features

to the LM1865 FM IF system The LM1865 is designed for use in electronically tuned radio applications It contains both deviation and signal level stop circuitry in addition to an open-collector stop output The LM1865 generates a reverse AGC voltage (ie decreasing AGC voltage with increasing signal) Y Y Y Meter output proportional to signal level Stop detector with open-collector output Adjustable signal level mute stop threshold controlled either by ultrasonic noise in the recovered audio or by the meter output Adjustable deviation mute stop threshold Separate time constants for signal level a.