HA12231 查看數據表（PDF） - Hitachi -> Renesas Electronics

零件编号

产品描述 (功能)

生产厂家

HA12231

Audio Signal Processor for Car Deck (PB 1 Chip)

Hitachi -> Renesas Electronics 

HA12231FP

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.

S/R

16 TAI(L)

23.5dB

−6dB

VCC

REX2

CEX2

REX1

+CEX1

R1

330kΩ

+ C1

0.33µF

DVCC

7

MS Gv

13

MS DET

LPF

25kHz

90kΩ 33.3kΩ

−

−3.5dB

+

MS Amp.

RECT

66.7kΩ

MS

12

GND

20

RL

Micro

computer

23.5dB

TAI(R)

5

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

11

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