公开(公告)号：US20150355281A1

公开(公告)日：2015-12-10

申请号：US14296764

申请日：2014-06-05

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： In Hee LEE ,  Yoonmyung LEE ,  Dennis Michael SYLVESTER ,  David Theodore BLAAUW

IPC: G01R31/36 ,  H02J7/00

CPC classification number: G01R31/3606 ,  G01R31/3662 ,  H02J7/0063 ,  H02J2007/0067

Abstract: An electronic device has an energy storage device and circuitry supplied with a storage device voltage from the energy storage device. A supervisor circuit enables the circuitry in response to the storage device exceeding an enable threshold voltage. The supervisor circuit detects a resistance parameter which is indicative of an internal resistance of the energy storage device and adjusts the enable threshold voltage based on the resistance parameter.

Abstract translation: 电子装置具有能量存储装置和电路，该电路具有来自能量存储装置的存储装置电压。 管理电路使电路响应于存储设备超过使能阈值电压。 监控电路检测表示能量存储装置的内部电阻的电阻参数，并基于电阻参数调整使能阈值电压。

公开(公告)号：US20170170722A1

公开(公告)日：2017-06-15

申请号：US15116072

申请日：2015-02-05

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Wanyeong JUNG ,  Sechang OH ,  Suyoung BANG ,  Yoonmyung LEE ,  Dennis SYLVESTER ,  David T. BLAAUW

IPC: H02M3/07 ,  H03K19/0175 ,  H02M1/36 ,  H03K3/03

CPC classification number: H02M3/07 ,  H02M1/36 ,  H03K3/0315 ,  H03K19/017509

Abstract: A self-oscillating DC-DC converter structure is proposed in which an oscillator is completely internalized within the switched-capacitor network. This eliminates power overhead of clock generation and level shifting and enables higher efficiency at lower power levels. Voltage doublers are cascaded to form a complete energy harvester with a wide load range from 5 nW to 5 μW and self-starting operation down to 140 mV. Because each doubler is self-oscillating, the frequency of each stage can be independently modulated, thereby optimizing the overall conversion efficiency.