Low Voltage Bus-Operated Overvoltage Protection System.
DEPARTMENT OF THE NAVY WASHINGTON D C
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The patent describes an overvoltage protection circuit for a power supply which compares a bus voltage to a reference voltage developed from the bus and produces an output signal initiating appropriate action when the bus threshold levels established by the reference are exceeded. Since the circuit is powered directly from the bus, it does not require an independent power supply. Instead, the combination of a constant current source and a compensated voltage network convert the fluctuating bus voltage into a stabilized reference voltage. The reference voltage is then compared to the bus voltage by differential amplifier means.
- Electrical and Electronic Equipment