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