Obsolete

Product(s)

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Product(s)

Obsolete

Product(s)

- Obsolete

Product(s)

TDA7407D

12/34

6

MULTIPATH DETECTOR

Table 10. Quality Detector

6.1

DESCRIPTION OF THE AUDIOPROCESSORPART

6.1.1 Input Multiplexer

6.1.2 Input stages

Most of the input stages have remained the same as in preceeding ST audioprocessors with exception of

the CD inputs (see figure 8).In the meantime there are some CD players in the market having a significant

high source impedance which affects strongly the common-mode rejection of the normal differential input

stage. The additional buffer of the CD input avoids this drawback and offers the full common-mode rejec-

Table 9. ELECTRICAL CHARACTERISTICS (continued)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Center Frequency of Multipath-

Bandpass

stereodecoder locked on

Pilottono

19

KHz

Bandpass Gain

6dB

12

dB

16

dB

18

dB

7.6

dB

4.6

dB

0dB

off

dB

Rectifier Charge Current

0.5

µA

1.0

µA

Rectifier Discharge Current

0.5

1

1.5

mA

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

A

Multipath Influence Factor

Addr. 12 / Bit 5+6

00

01

10

11

0.7

0.85

1.00

1.15

dB

dB

dB

dB

B

Noise Influence Factor

Addr. 16 / Bit 1+2

00

01

10

11

15

12

9

6

dB

dB

dB

dB

Obsolete

Product(s)

- Obsolete

Product(s)