HA12165 查看數據表（PDF） - Hitachi -> Renesas Electronics

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HA12165

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

Hitachi -> Renesas Electronics 

HA12163 Series

4. Input Block Diagram and Level Diagram

R34

5.1 k

R35

5.1 k

R38

330 k

R39

180

R36

12 k

R37

18 k

C25

0.01 µ

C24

0.1 µ

EQ OUT

TAI

30 mVrms

EQ OUT-M (–28.2 dBs)

HA12163: 300 mVrms (–8.2 dBs)

HA12164: 450 mVrms (–4.7 dBs)

HA12165: 580 mVrms (–2.5 dBs)

HA12160: 550 mVrms (–2.9 dBs)

RAI

42.4 mVrms

(–25.2 dBs)

PBOUT

EQ AMP.

–+

NFI

RIN

VREF

0.6 mVrms

(–62.2 dBs)

INPUT AMP.

+

–

NR circuit

RECOUT

300 mVrms

(–8.2 dBs)

FIN

The each level shown above is typical value

when offering PBOUT level to PBOUT pin.

(EQ AMP Gv = 40 dB f = 1 kHz)

Figure 2 Input Block Diagram

5. Adjustment of Playback Dolby Level

After replace R34 and R35 with a half-fix volume of 10 kΩ, adjust RECOUT level to be Dolby level

with playback mode.

Rev.4, Jun. 1999, page 17 of 66

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