GPE-1326/2323/3323/4323 Series User Manual
14
The auxiliary rectifiers D120~ D123 provide bias
voltage filtered by the capacitors C120 and C121,
for the pre-regulators U150 and U151. They
provide a regulated voltage for other modules.
The main rectifier is a full wave bridge rectifier. It
provides the power after the rectifier is filtered by
the capacitor C101, and then regulated via a series-
wound regulator, which is finally delivered to the
output terminal.
U151 is a comparator amplifier which compares
the reference voltage to the feedback voltage, and
then delivers it to Q151, which then calibrates the
output voltage.
U131 is a comparator which activates when the
unit is overloaded and it controls the output of
U132 to turn off the output and inform the user.
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