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TDA7461N

MULTIPATH DETECTOR

Internal 19kHz bandpass filter

Programmable bandpass and rectifier gain

ELECTRICAL CHARACTERISTICS

(continued)

Symbol

f

CMP

G

BPMP

Parameter

Center frequency of Multipath-

Bandpass

Bandpass Gain

Test Condition

stereodecoder locked on pilot

tone

bits D

2

, D

1

configuration byte = 00

bits D

2

, D

1

configuration byte = 01

bits D

2

, D

1

configuration byte = 10

bits D

2

, D

1

configuration byte = 11

G

RECTMP

Rectifier Gain

bits D

7,

D

6

configuration byte = 00

bits D

7

, D

6

configuration byte = 01

bits D

7

, D

6

configuration byte = 10

I

CHMP

I

DISMP

Rectifier Charge Current

Rectifier Discharge Current

Min.

Typ.

19

6

16

12

18

7.6

4.6

0

1

1.5

Max.

Unit

KHz

dB

dB

dB

dB

dB

dB

dB

碌A

mA

Two pin solution fully independent usable for

external programming

Selectable internal influence on Stereoblend

Figure 17. Block diagram of the stereodecoder

DEMODULATOR

INGAIN

MPX

100K

3.5 ... 11dB

STEP 2.5dB

INFILTER

LP 80KHz

4.th ORDER

- PLOT CANC

- ROLL-OFF COMP.

- LP 25KHz

DEEMPHASIS

+ HIGHCUT

t=50 or 75碌s

FM_L

FM_R

PLL +

PILOT-DET.

F19

F38

STEREO

NOISE BLANKER

SB CONTROL

REF 5V

VSBL

HC

CONTROL

D

A

VHCCH

VHCCL

MPINFL

LEVEL INPUT

LP 2.2KHZ

1.th ORDER

GAIN 0..10dB

HOLDN

-

LEVEL INTERN

LEVEL

MULTIPATH

DETECTOR

D97AU762

MPIN

MPOUT

16/31

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