University of Michigan

Arm Limited

Sechang Oh

David Theodore Blaauw

Dennis Sylvester

Wanyeong Jung

Parameshwarappa Anand Kumar Savanth

Fabrice Blanc

Yoonmyung Lee

In Hee Lee

Seok Hyeon Jeong

Kyojin Choo

Suyoung Bang

Rohit Rothe

An amplifier is presented with a sample and average common mode feedback resistor. The amplifier circuit includes a feedback capacitor and a feedback resistor in parallel with the feedback capacitor, where the feedback capacitor and the feedback resistor form part of the negative feedback path for the amplifier. Of note, the feedback resistor is comprised of a low pass filter in series with a switched capacitor resistor, such that the low pass filter is electrically coupled to the output of the amplifier circuit and the switched capacitor resistor is electrically coupled to the inverting input of the amplifier circuit. The amplifier circuit further includes a control circuit interfaced with switches of the switched capacitor resistor. The high pass corner of the switched capacitor resistor is preferably lower than corner of the low pass filter.

Amplifier with sample and average common mode feedback resistor

In a particular implementation, an apparatus to control clamping devices includes a first control circuit and a second control circuit. The first control circuit is responsive to a detection signal and generates a first drive signal to control a body diode of a clamping device. The second control circuit is responsive to the detection signal and generates a second drive signal to control the gate terminal of the clamping device.

Devices and methods to control clamping devices

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.

Multi-dimensional array of impedance elements

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Ann Arbor, MI, United States of America

Sechang Oh