Description
The IC U4065B is a bipolar integrated FM-frontend circuit. It contains a mixer, an oscillator, two IF preamplifiers and an unique interference sensor. The device is designed for high performance car radio and home receiver applications.

Features
● All frontend functions of a high performance FMreceiver, except the RF preamplifier, are integrated
● Improved dynamic range by high current double balanced mixer design and a new AGC conception with 3 loops on chip
● Improved blocking and intermod behavior by use of an unique “interference” sensor controlling the AGC
● Easy cascading of three IF filters (ceramic) by use of two on-chip IF preamplifiers
● On-chip control functions are available for system gain adjust (dB linear vs. dc current)
● Low noise LO design
● ESD protected