HA12217F 데이터 시트보기 (PDF) - Renesas Electronics

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HA12217F

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

Renesas Electronics 

HA12216F/HA12221F 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.

CEX2

REX2

VCC

+CEX1

REX1

C8

0.01µF

R11

330kΩ

+ C6

0.33µF

DVCC

28 TAI (L)

×1

21 20

19 18

MS MS MA MSI

SER REP OUT

17

MS

DET

L⋅R signal

addition circuit

−6dB +

−

LPF

25kHz

20dB

90kΩ

−

+

MS

Amp.

×1

TAI (R)

3

DET

100kΩ

MSOUT

15

GND

36

35

RL

Micro

computer

Figure 4 Music Sensor Block Diagram

GV2

f3

f4

Repeat mode (REP)

GV1

f1

f2

Search mode (SER)

10

100

1k

10k 25k 100k

f (Hz)

Figure 5 Frequency Response

Rev.6.00 Jun 15, 2005 page 11 of 52

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