Atmosic Technologies Inc.

Dimitrios Filippos Papadopoulos

Justin Ann-Ping Hwang

Manolis Terrovitis

A wireless device includes an energy harvester to convert harvested energy into a harvested voltage, a first port selectively connected to an external USB power source, a second port selectively connected to a battery, a load including a plurality of circuits, and a power management circuit coupled to the energy harvester, the first and second ports, and the load. The power management circuit includes a controller configured to select one of the energy harvester, the USB power source, or the battery as a power source at system startup based on one or more of an amount of the harvested voltage, a presence of a connection with the USB power source, a presence of a connection with the battery, or an amount of charge or voltage stored by the battery. The power management circuit also includes a switcher matrix to power the load at system startup using the selected power source.

Dynamically selectable power configurations

This disclosure provides a method and apparatus for controlling a plurality of radio-frequency (RF) power harvesters configured to generate power from received RF signals. A controller may monitor output power from the RF power harvesters and a sequence of reset signals. Based on the output powers and the sequence of reset signals, the controller may couple the RF power harvesters to a charge-storage device and one or more voltage regulators. In some implementations, the controller may also monitor RF envelope amplitude and couple the RF power harvesters to the charge storage device based on RF envelope amplitude.

Method and apparatus for radio-frequency power harvesting control

This disclosure provides a method and apparatus for optimizing power transfer from radio-frequency (RF) rectifiers to a voltage regulator. A first RF rectifier may be configured to generate a first voltage and a second RF rectifier may be configured to generate a second voltage, where the second voltage is an open circuit output voltage. The voltage regulator may regulate the first voltage to provide power. A controller may be configured to optimize power transfer from the first RF receiver to the voltage regulator based on the first voltage and the second voltage.

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Belmont, CA, United States of America

Dimitrios Filippos Papadopoulos