U4275B

Manufacturer Part NumberU4275B
ManufacturerATMEL Corporation
U4275B datasheet
 
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Features
Preparation of the fieldstrength signal
Detection of multipath and common channel interferences
Evaluation of the receiving conditions by microcomputer
Interrupt output for abruptly occuring interferences
Suitable for analog as well as digital processing
Mute function controllable by microcomputer
Multipath noise cancellation
Only few external components necessary
Description
The U4275B is a bipolar integrated receiving conditions analyser as well as multipath
noise cancellation circuit. It is designed for high-performance car radio applications.
Block Diagram
Figure 1.
FIL19
20
14
CRIN
Oscillator
Common
Filter
1
Multipath
FSIN
detector
3
AVFS
2
MNC
Buffer
BFSOUT
control
MUTE
Ordering Information
Extended Type Number
U4275B-MFL
U4275B-MFLG3
FIL26
CCHFIL
17
19
Interference
interrupt
channel
detector
Reset
Address
logic
Analogue
multiplex
Multipath
Bandgap
Noise
Cancellation
(Gain 1.5)
4
5
8
10
18
6
MPFIL
GND2
VREF
MPXIN
MPXOUT
Package
SO20 plastic
SO20 plastic
Taped and reeled
FM Receiving
Condition
Analyzer and
Multipath Noise
Cancellation IC
U4275B
9
INT
12
ADDR0
13
ADDR1
15
OE
11
ANAOUT
7
V
S
16
GND1
Remarks
Rev. A3, 16-Oct-01
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U4275B Summary of contents