Microsoft Technology Licensing, LLC

Perry Samuel Stultz

Chee Kiong Fong

Suet Fong Tin

Edward Charles Giaimo, Iii

David Richard Perchilk

Michael Donovan Rulien

Duane Martin Evans

Harjit Singh

Peter Anthony Atkinson

Jeremy Braun

Iii Giaimo Edward C

Edward C Iii Giaimo

Peter Atkinson

A leakage reduction circuit is described herein that is configured to reduce high voltage leakage that may occur in electrical power step-down scenarios. The leakage reduction circuit, for instance, may be employed in a power adapter for a client device, such as a mobile computing device. For example, a power adapter may include a high voltage alternating current (AC) input, and circuitry for converting the AC input into lower voltage direct current (DC) for output to a client device. Implementations of the disclosed leakage reduction circuit include an arrangement of capacitors that provides a noise return path (e.g., for common mode noise) in a power adapter, while reducing high voltage leakage that may occur from a high voltage AC input to a lower voltage DC output of the power adapter.

Leakage reduction circuit

A power source capable of supplying power to operate electronics of a system is disclosed. In one example, the power source takes advantage of an electrical potential difference between primary and secondary grounds. The power source can reduce system cost and power consumption.

Converting leakage current to DC output

Anti-arcing circuits are described herein that are configured to prevent or substantially mitigate arcing when a power adapter is connected/disconnected from a client device. The anti-arcing circuit restricts power supplied when a connection of a connector of a power adapter to the adapter interface is not fully established. The anti-arcing circuit is further configured to detect when a connection is made and remove the restriction to supply power for operations of the client device. In one approach, the anti-arcing circuit includes two different paths and components associated with a detection mode and operational mode respectively. In the detection mode, power supply is suppressed and a current pulse may be sent to determine if a connection is established. If current is detected, a switch is made to operational mode and power for normal device operations is supplied.

Anti-arcing circuit

A communication system where first and second devices communicate concurrently and bidirectionally over a single wire and a ground. The second device can be a computing device having a powered component which requires a certain power output, for instance, and the first device may be a power supply unit. The second device provides a signal on a control line (the single wire) which is characterized by a frequency, pulse width, duty cycle and/or an amplitude which is associated with a message from the second device. The first device recognizes the message in the signal and invokes a corresponding function, such as by enabling a corresponding power supply. The power supply provides power to the second device via a separate power line. Further, the first device modifies the signal, without adding power, to provide a message from the first device, concurrent with the message from the second device.

Single wire concurrent bi-directional communication for PSU

Growing community of inventors

Carnation, WA, United States of America

Perry Samuel Stultz