HA12179F Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HA12179F

Audio Signal Processer for Car Deck and Cassette Deck (Dolby B-type NR with PB Amp)

Hitachi -> Renesas Electronics 

HA12179F

PB Equalizer for Double Speed

PB equalizer can be design for double speed by using external components shown in figure 8. Application

data is shown in figure 9.

4.7µ

+

R35

5.1k

No

0.015µ

R

Do

22k

VR1

0.1µ

+

R38

330k

EQ OUT

TAI

R36

12k

EQ OUT-M

R37

18k

C25

0.01µ

EQ AMP.

NFI

–+

RIN

VREF

No : Normal speed

Do : Double speed

PBOUT

INPUT AMP.

+

–

NR circuit

RECOUT

FIN

Note : Please adjust RECOUT level to

be Dolby level with volume of

VR1.

Figure 8 Application Circuit for Double Speed

Rev.1, Apr. 1994, page 17 of 40

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