Patent ID: 11921532
Assignee: LANDIS+GYR TECHNOLOGY, INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A power supply control circuit for controlling operation of a power supply for an electricity meter during an alternating current (AC) power outage, the power supply control circuit comprising:
an input section configured to receive a representation of an output voltage of the power supply and a power loss signal, wherein the input section comprises:
a first switching device configured to receive the representation of the output voltage of the power supply; and
a second switching device configured to receive the power loss signal,
wherein the second switching device is configured to activate the first switching device when the power loss signal is received, and
wherein the first switching device is configured to supply the representation of the output voltage to a comparator section when activated by the second switching device;

the comparator section configured to generate an output signal based on the power loss signal and the representation of the output voltage; and
a feedback control section configured to control a feedback signal to the power supply based on the output signal from the comparator section,
wherein when activated by the output signal from the comparator section, the feedback control section is configured to change the feedback signal with respect to the feedback signal generated by a feedback circuit based on the output voltage, and
wherein the change in the feedback signal causes the power supply to stop supplying the output voltage.