HA12230NT データシートの表示（PDF） - Hitachi -> Renesas Electronics

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HA12230NT

Audio Signal Processor for Cassette Deck

Hitachi -> Renesas Electronics 

HA12230NT

Music Sensor Mixing Block

• Gain with TAI to MAOUT

Case of one-side input, gain with TAI to MAOUT is attenuations 6 dB.

GV = (L ⋅ R signal addition circuit) + (MS Amp. gain) + (TAI one-side input attenuations)

= 20 + 20log

100 k + 45 k

45 k

+ (−6)

≈ 24.2 (dB)

For a necessary case, please in series add CR to MAI terminal for gain regulation.

24 TAI(L)

23 PBOUT(L)

1 k 18.4 k

Mute −

+

×1

−6dB

×1

Line Amp.

+

Mute −

L ⋅ R signal

addition circuit

+

−

LPF

25 kHz

20 dB

MS Amp.

+

−

100 k

45 k

1 k 18.4 k

TAI(R)

8

30 mVrms

PBOUT(R)

9

+580 mVrms

MAI

11

10 MAOUT

Figure 4 Music Sensor Mixing Amp. Block Diagram

Rev.6, Nov. 2000, page 10 of 32

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