U4276B
FM Multipath Noise Cancellation
Description
The U4276B is a bipolar integrated multipath noise cancellation circuit. It is designed for high performance car radio
applications.
Features
D
Preparation of the fieldstrength signal
D
Multipath noise cancellation
D
Mute function controllable by microcomputer
D
Suitable for analogue as well as digital processing
D
Only a few external components necessary
Block Diagram
BFSOUT
7
2
FSIN
Buffer
Bandgap
V
S
6
3
GND
1
AVFS
4
MPXIN
Multipath
detection
Multipath
noise
cancellation
8
5
MPXOUT
95 10619
MUTE
Pin Description
Pin
1
2
3
4
5
6
7
8
Symbol
AVFS
FSIN
GND
MPXIN
MPXOUT
VS
BFSOUT
MUTE
Function
Average of fieldstrength signal
Fieldstrength input
Ground
Multiplex input signal
Multiplex output signal
Supply voltage
Buffered fieldstrength output
External mute input
AVFS 1
FSIN 2
GND 3
MPXIN 4
95 10632
8 MUTE
7 BFSOUT
6 VS
5
MPXOUT
TELEFUNKEN Semiconductors
Rev. A1, 05-Sep-96
1 (8)
Preliminary Information