HA12209F データシートの表示（PDF） - Hitachi -> Renesas Electronics

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HA12209F

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

Hitachi -> Renesas Electronics 

HA12209F

PB Equalizer

By switching logical input level of 11 pin (for Ain) and 14 pin (for Bin), you can equalize corresponding to

tape position at play back mode.

With the capacity CEX1 capacitance that we showed for figure 2 70 µs by the way figure seem to 3 they

are decided.

Gv

(t1)

(t2)

t1 = CEX1 · (12k + 15k)

t2 = CEX1 · 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

C26

R12

0.01µ 330k

+ C10

0.33µ

DVCC

45k

LPF

25kHz

MAI

MA MSIN MS

RL

100k

OUT

DET

–

+

MS AMP

DET

100k

MS OUT

GND

Microcomputer

GND

PB(R)

Figure 4 Music Sensor Block Diagram

Unit R : Ω

C:F

Rev.2, Jun. 1999, page 10 of 49

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