Oscillator voltage reference method and apparatus

    公开(公告)号:US12015341B2

    公开(公告)日:2024-06-18

    申请号:US17658718

    申请日:2022-04-11

    申请人: Wiliot, Ltd.

    IPC分类号: H02M3/155 G06K19/07 H02J50/00

    摘要: Apparatus providing a regulated power supply to an oscillator comprises a reference voltage generator supplying a voltage reference, a regulator producing, based on a voltage received thereat, a regulated supply used by the oscillator which bases its frequency thereon, a capacitor having a terminal coupled to the regulator at a point, and a switch that is coupled to the reference voltage generator and to the point, wherein the closed switch couples the reference voltage generator to the point and wherein the open switch disconnects the point from the reference voltage generator, the switch being closed for a first time period during which a voltage based on the voltage reference from the reference voltage generator is supplied to the regulator and capacitor, and for a second, subsequent, time period the switch is opened and voltage stored on the capacitor is supplied to the regulator.

    Techniques for tuning an antenna of an energy harvester

    公开(公告)号:US11689053B2

    公开(公告)日:2023-06-27

    申请号:US17387543

    申请日:2021-07-28

    申请人: Wiliot, Ltd

    摘要: An energy harvester and a method for tuning an antenna frequency of the energy harvester is provided. The energy harvester includes: a tuner circuit coupled to at least one antenna, wherein the tuner circuit includes at least one adjustable capacitor, wherein the at least one antenna is configured to harvest an electromagnetic ambient energy; a controller connected to the tuner circuit, wherein the controller is configured to control a voltage level within the energy harvester, wherein the controller is configured to iteratively set the at least one adjustable capacitor to tuning states until a best tuning state is set, wherein the best tuning state of the at least one adjustable capacitor substantially matches an antenna frequency and a frequency of the electromagnetic ambient energy; and a rectifier to convert the electromagnetic ambient energy to a direct current.