Motorola V186 - Cell Phone - GSM System Planner Manual page 46

I/O Circuit Diagram:
12V
Floating
Voltage
Converter
AO - Typical Output Circuit
Variable
Current source
50Ω
20V
D/A Control
-
+
Variable
Voltage source
42
Analog Output Modules
330Ω
30V
30V 26V
Iout
PGND
RET
Vout