University of Michigan

Wanyeong Jung

David Theodore Blaauw

Dennis Sylvester

Sechang Oh

Dennis Michael Chen Sylvester

Yoonmyung Lee

Suyoung Bang

Various implementations described herein are directed to an integrated circuit. The integrated circuit may include a first voltage source providing a first voltage having a first polarity. The integrated circuit may include a second voltage source providing a second voltage having a second polarity that is opposite the first polarity. The integrated circuit may include a first circuit portion configured to receive the first and second voltages and provide one or more feedback voltages. The integrated circuit may include a second circuit portion configured to receive the first and second voltages along with the one or more feedback voltages and provide an output voltage that is proportional to the first voltage based on a rational conversion ratio that is derived by selection of at least one of the first and second voltages and the one or more feedback voltages.

Rational conversion ratio converter

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 &#x3bc;W 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.

Self-oscillating switched-capacitor DC-DC converter

Circuitry formed of a two-dimensional regular array of capacitive elementsis coupled to decoding circuitry in the form of column decoderand a row decoder. The decodersare used to select a start point and an end point within a sequence of selected capacitive elements to be connected in parallel following a horizontal raster scan arrangement. The selected capacitive elements may be used to generate an output voltage with a magnitude corresponding to the number of selected capacitive elements.

Growing community of inventors

Ann Arbor, MI, United States of America

Wanyeong Jung