Crown Macro-Tech MA-24X6 - Page 20

Operation Manual
Macro-Tech MA-24X6 & 36X12 Power Amplifiers
page 20
6 Theory of Operation
ONLY ONE CHANNEL SHOWN
NPN HI
OUTPUT
STAGE
NPN LOW
OUTPUT
STAGE
PNP LOW
OUTPUT
STAGE
PNP HI
OUTPUT
STAGE
+
OUTPUT
+Vcc
–Vcc
TRANSLATOR
LVA
LVA
+Vcc
–Vcc
BIAS
CURRENT
LIMIT
TRANSLATOR
BALANCE
INPUT STAGE
P.I.P.
BALANCED
INPUTS
XLR
VARIABLE
GAIN STAGE
ERROR
AMP
BIAS
BRIDGE
BALANCE
+Vcc
–Vcc
ODEP
A
B
B
(ODEP)
D
(ODEP)
E
A
(ODEP)
C
(ODEP)
C
D
DISPLAY
1/4" PHONE
Figure 6.1 Circuit Block Diagram (Channel 1)