Hewlett-Packard Development Company, L.p.

Robert Ray

Robert Niemand

Ron Juve

Duane A Koehler

Roger N Switzer

Glenn Michael Smith

Nikholas Hubbard

A system of an embodiment of the invention is disclosed that includes an interconnect, an electronic device, and a power supply. The interconnect is to carry direct current (DC). The electronic device is connectable to the interconnect to receive DC, and has a communication circuit to transmit signals over the interconnect. The power supply is connectable to the interconnect to provide the DC to the electronic device, and has a decoder circuit to decode the signals received over the interconnect from the electronic device.

Transmitting signals over interconnect carrying direct current from power supply to electronic device

A mechanism of one embodiment of the invention is disclosed that disconnects an electronic device from a power source includes a user-actuable switch, an electronically controllable switch, and a feedback mechanism. The electronically controllable switch couples the power source to the electronic device. The feedback mechanism turns on and off the electronically controllable switch in response to actuation of the user-actuable switch.

Disconnection of electronic device from power source

In an implementation of power supply adjustment, a power supply generates an output to a powered device that generates a control signal which is input to an adjustment circuit that generates a difference signal to adjust the output of the power supply.

Power supply adjustment

A power supply of one embodiment of the invention is disclosed that includes a conversion mechanism and a feedback mechanism. The conversion mechanism is to control conversion of a first direct current (DC) signal from to a second DC signal provided to an electronic device by switching the first DC signal to vary the second DC signal. The feedback mechanism is to cause the switching control mechanism to operate in a nominal-power mode or a reduced-power mode according to a control signal received from the electronic device. The conversion mechanism is caused in the reduced-power mode to lessen at least one of the duty cycle and the frequency at which the first DC signal is switched until the voltage of the second DC signal decays to a first voltage level.

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Corbett, OR, United States of America

Robert Ray