U3810BM datasheet(20/31 Pages) TEMIC

20 / 31 page

TELEFUNKEN Semiconductors

U3810BM

Rev. A1: 19.01.1996

20 (31)

Internal registers

set by serial bus

Internal signal set

by clock count

S4 (Fig. 9)

AMF

SIN1

SIN0

F227

I measured

I10

X: either 1 or 0

Note 7: DTMF calculations

BF level without attenuation with

pre-emphasis A:

BF level without attenuation with

pre-emphasis B:

HF level without attenuation with

pre-emphasis A:

HF level without attenuation with

pre-emphasis B:

Pre-emphasis A without attenuation:

Pre-emphasis B without attenuation:

BF level with attenuation with

pre-emphasis A:

BF level with attenuation with

pre-emphasis B:

HF level with attenuation

with pre-emphasis A:

HF level with attenuation

with pre-emphasis B:

Pre-emphasis A

without attenuation:

Pre-emphasis B

without attenuation:

Confidence tone level:

BFOA

) I7 )

) I2

VDD

BFOB

) I8 )

) I3

VDD

HFOA

) I6 )

) I1

VDD

HFOB

) I6 )

) I1

VDD

PROA

+ 20 log HFOA

BFOA

PROB

+ 20 log HFOB

BFOB

BF1A

) I7 ) I10 )

) I2 ) I5

VDD

BF1B

) I8 ) I10 )

) I3 ) I5

VDD

HF1A

) I6 ) I10 )

) I1 ) I5

VDD

HF1B

) I6 ) I10 )

) I1 ) I5

VDD

PR1A

+ 20 log HF1A

BF1A

PR1B

+ 20 log HF1B

BF1B

CTL

) I9 )

) I4

VDD

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