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Le MX-D1 est un amplificateur de puissance stéréo numérique PWM (Pulse Width Modulation) performant bénéficiant des
toutes dernières technologies Yamaha d’amplification de puissance et d’alimentation à commutation.
Les schémas logiques ci-dessous détaillent les circuits d’amplification et d’alimentation.
SCHÉMAS LOGIQUES
Schéma logique de l’alimentation
IN
YDA133
SP OUT
YDA134
YDA134
0
V
+B
-B
L
C
Input amp
Active power
control
Output current information
Analog
feedback
Cross
feedback
2.8 MHz
clock input
Constant-gain
PLL
modulator circuit
Real-time
protection
Real-time
protection
Protection
/mute
AC IN
88kHz
2.8MHz
(amp)
OSC
88kHz
100V(on)
200V(off)
+B
-B
OV
+
-
0V
2.8MHz
(amp)
Line filter
Choke
Inrush
protection
circuit
Sub-
transformer
Protection circuit
Microcomputer
Isolator
Right-channel power supply
Driver
Driver
For op-amps
and LSI
Magnetically
-coupled
rectifier circuit
External interface
Schéma logique de l’amplificateur
02-MX-D1_GB_F.fm Page 6 Wednesday, October 22, 2003 2:06 PM
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