Mija Industries, Inc.

Robert M Manning

John J McSheffrey

Jorge Rubinstein

Michaela J McSheffrey

A power management system and method including a normally-open switch, an on/off circuit, a microprocessor, and at least one sensor to monitor a condition. The on/off circuit includes an on/off control gate-controlled switch device such as a PMOS device for system power, a flip/flop switch to respectively activate and deactivate the on/off control PMOS device, and a transition detection circuit connected to the normally-open switch. A single DC power source establishes a source voltage to power the on/off circuit and the normally-open switch. The transition detection circuit generates an 'on' signal when the user initially activates the normally-open switch, and supplies the 'on' signal to the flip/flop switch to change it to an &#x201c;on&#x201d; state to activate the on/off control PMOS device. While activated, the on/off control PMOS device enables system power from the power source to be provided to at least the sensor and the microprocessor. The microprocessor generates an &#x201c;off&#x201d; signal when the normally-open switch is activated for at least a selected period of time, and supplies the &#x201c;off&#x201d; signal to the flip/flop switch to change it to an &#x201c;off&#x201d; state to deactivate the on/off control PMOS device and thereby disable system power to at least the sensor and the microprocessor.

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Weymouth, MA, United States of America

Robert M Manning