公开(公告)号：US10056849B2

公开(公告)日：2018-08-21

申请号：US14623025

申请日：2015-02-16

Applicant: Analog Devices Global

Inventor： Xing Li ,  Yong Feng ,  Bin Shao

IPC: H02N2/18

CPC classification number: H02N2/181

Abstract: An impedance matching circuit is provided for use with a piezotransducer that includes a parasitic capacitor comprising: an inductor coupled in parallel with the parasitic capacitor; a peak and valley detection circuit configured to detect output voltage waveform peaks and valleys; a first switch circuit configured to bias flip the output voltage waveform at a selectable first time relative to a detected peak and at a selectable first time relative to a detected valley; a second switch circuit configured to couple the inductor to the energy storage circuit at a selectable second time following each output voltage bias flip; an energy monitoring circuit to provide an indication of energy flow from the inductor to the energy storage circuit following each output voltage bias flip; and a maximum power point tracking (MPPT) circuit configured to select the first time and the second time based at least in part upon the indicated energy flow.

公开(公告)号：US10033304B2

公开(公告)日：2018-07-24

申请号：US14972800

申请日：2015-12-17

Applicant: Analog Devices Global

Inventor： Yong Feng ,  Xing Li ,  Bin Shao

IPC: H02N2/18

Abstract: An electronic circuit can be coupled to an energy harvesting device. The output of the energy harvesting device can provide a damped oscillating waveform elicited from a transient stimulus applied to the energy harvesting device, such as in response to mechanical shock or mechanical impact excitation. A first switch can be coupled between the energy harvesting device and an inductor and configured to selectively connect the input node to the inductor. A second switch can be coupled between the inductor and an energy storage device, the second switch configured to selectively couple the inductor to the energy storage device. A control circuit can be coupled to the first and second switches, such as configured to operate the first and second switches according to one or more of an over bias flip technique, a half bias flip technique, or a bias flip technique.

公开(公告)号：US20170149361A1

公开(公告)日：2017-05-25

申请号：US14972800

申请日：2015-12-17

Applicant: Analog Devices Global

Inventor： Yong Feng ,  Xing Li ,  Bin Shao

IPC: H02N2/18

CPC classification number: H02N2/181

Abstract: An electronic circuit can be coupled to an energy harvesting device. The output of the energy harvesting device can provide a damped oscillating waveform elicited from a transient stimulus applied to the energy harvesting device, such as in response to mechanical shock or mechanical impact excitation. A first switch can be coupled between the energy harvesting device and an inductor and configured to selectively connect the input node to the inductor. A second switch can be coupled between the inductor and an energy storage device, the second switch configured to selectively couple the inductor to the energy storage device. A control circuit can be coupled to the first and second switches, such as configured to operate the first and second switches according to one or more of an over bias flip technique, a half bias flip technique, or a bias flip technique.