HA12227F データシートの表示（PDF） - Hitachi -> Renesas Electronics

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HA12227F

Audio Signal Processor for Cassette Deck (Dolby B-type NR with Recording System)

Hitachi -> Renesas Electronics 

HA12226F/HA12227F

PB Equalizer

By switching logical input level of pin 17 (for Ain) and pin 19 (for Bin), you can equalize corresponding to

tape position at play back mode.

GV

t1

t2

t1 = C2 ⋅ (12k + 15k)

t2 = C2 ⋅ 15k

f

Figure 3 Frequency Characteristic of PB Equalizer

The Sensitivity Adjustment of Music Sensor

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

REP

PB (L)

−6dB

VCC

C16 R13

1000p 330k

+ C13

0.33µ

D VCC

8.2k

LPF

25kHz

MAI

MA MSIN MS

RL

100k

OUT

DET

−

+

MS AMP

DET

50k

MS OUT

GND

Microcomputer

GND

PB (R)

Figure 4 Music Sensor Block Diagram

Rev.6, Dec. 2000, page 12 of 86

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