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U4275B

TEMIC Semiconductors
Part Number U4275B
Manufacturer TEMIC Semiconductors
Description FM-Receiving Condition Analyser and Multipath Noise Cancellation
Published Apr 16, 2005
Detailed Description TELEFUNKEN Semiconductors U4275B FM-Receiving Condition Analyser and Multipath Noise Cancellation Description The U427...
Datasheet PDF File U4275B PDF File

U4275B
U4275B

Overview
TELEFUNKEN Semiconductors U4275B FM-Receiving Condition Analyser and Multipath Noise Cancellation 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.
Features D Preparation of the fieldstrength signal D Detection of multipath and common channel interferences D Evaluation of the receiving conditions by microcomputer D D D D D Interrupt output for abruptly occuring interferences Suitable for analogue as well as digital processing Mute function controllable by microcomputer Multipath noise cancellation Only a few external components necessary Block diagram FIL19 20 CRIN 14 Oscillator Common channel detector Filter Interference interrupt 9 INT FIL26 19 CCHFIL 17 12 Reset Address logic 1 FSIN AVFS 3 Multipath detector Analogue multiplex 11 13 15 ADDR0 ADDR1 OE ANAOUT 2 BFSOUT Buffer MNC control Multipath Noise Cancellation (Gain 1.
5) 18 4 5 6 8 Bandgap 7 VS 10 94 8644 16 GND1 MUTE MPFIL GND2 VREF MPXIN MPXOUT Rev.
A1: 14.
03.
1995 Preliminary Information 1 U4275B Pin description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Symbol FSIN BFSOUT AVFS MPXIN GND2 MPXOUT VS VREF INT MUTE ANAOUT ADDR0 ADDR1 CRIN OE GND1 CCFIL MPFIL FIL26 FIL19 Function Fieldstrength input Buffered fieldstrength output Average of fieldstrength signal Multiplex input signal Analogue ground Multiplex output signal Supply voltage Reference voltage Interrupt output External mute input Analogue multiplex output Address 0 for analogue multiplexer Address 1 for analogue multiplexer Ceramic resonator input (456 kHz) Output enable for ANAOUT Ground Filter for common channel detection Filter for multipath detection Filter for 26 kHz detection Filter for 19 kHz-Pilot detection TELEFUNKEN Semiconductors FSIN 1 BFSOUT 2 AVFS 3 MPXIN 4 GND2 5 MPXOUT 6 VS 7 20 FIL19 19 FIL26 18 MPFIL 17 CCFIL 16 GND1 15 OE 14 CRIN 13 ADDR1 12 ADDR0 11 ANAOUT 94...


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