HA12174 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HA12174

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

Hitachi -> Renesas Electronics 

HA12173 Series

The Sensitivity Adjustment of a Music Sensor

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

C14

VCC

R28

R27 0.01 µ

DVCC

R24

+ C13

R26

R25

330 k

0.33 µ

TAI (L)

X1

C28

4700 p

MS

VREF

FFI NOI

MA MSI MS

OUT

DET

IL

RL

L·R signal addition circuit

–6 dB

+

–

26 dB

LPF

25 kHz

+

–

MS AMP

DET

MS OUT

D GND

Microcomputer

X1

TAI (R)

100 k

D GND

Unit R: Ω

C: F

Figure 4 Music Sensor Block Diagram

Rev.1, Nov. 1992, page 16 of 66

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