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Micro-Tech 1200 Amplifier Service Manual
12
Theory
NEGATIVE
LOW SIDE
OUTPUT
PNP STAGE
POSITIVE
LOW SIDE
OUTPUT
NPN STAGE
NEGATIVE
HIGH SIDE
OUTPUT
PNP STAGE
POSITIVE
HIGH SIDE
OUTPUT
NPN STAGE
HIGH SIDE
BIAS
SERVO
+LVA
-1
-LVA
-1
+VOLTAGE
TRANSLATOR
-VOLTAGE
TRANSLATOR
OUTPUT
DEVICE
EMULATION
PROTECTION
ERROR
AMP
VGSBGS
BALANCED
INPUTS
INVERTING
BRIDGE
BALANCE
LOW SIDE
BIAS
DIODE
STRING
-1
-1
MAIN NEGATIVE FEEDBACK (NFb) LOOP
Figure 3. Typical Crown Amplifier Basic Block Diagram (One Channel Shown)