HA12193F Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HA12193F

Audio Signal Processor for Car Deck (Decode only Dolby B-type NR with PB Amp.)

Hitachi -> Renesas Electronics 

HA12192F/HA12197F/HA12212F Series

The Sensitivity Adjustment of Music Sensor

Adjusting MS Amp. gain by external resistor, the sensitivity of music sensor can set up.

The music sensor block diagram is shown in figure 4, and frequency response is shown in figure 5.

SER/REP

REP SER

mode mode

VCC

D VCC

REX2

2.7kΩ

CEX2 +

1µF

REX1

24kΩ

CEX1

0.01µF

R11

C8 330kΩ

0.01µF

+ C6

0.33µF

DIN(L)

+ Input Amp.

−

MSGV

MA MSI MS

OUT

DET

90kΩ

ATT

−6dB

LPF

25kHz

−

+

MS Amp.

DET

MSOUT

GND

IL

RL

Micro

computer

−

+ Input Amp.

DIN(R)

Note: Input impedance of MSI is 100 kΩ typical.

Figure 4 Music Sensor Block Diagram

GV2

GV

[dB]

GV1

f3

f4

Repeat mode

f1

f2

Search mode (FF or REW)

10

100

1k

10k

25k

100k

f [Hz]

Figure 5 Frequency Response

Rev.5, Jun. 1999, page 13 of 89

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