California Institute of Technology

University of Tennessee Research Foundation

Benjamin J Blalock

Mohammad Mehdi Mojarradi

Suheng Chen

Sorin Cristoloveanu

Kerem Akarvardar

Stephen Christopher Terry

Fei Wang

Amir Fijany

Leon Monroe Tolbert

Nikzad Toomarian

Elzbieta Kolawa

Farrokh Vatan

Ben Guo

Greg Levanas

Yuan Chen

Raymond S Cozy

Fan Xu

Robert Greenwell

A three-phase alternating current (AC) to direct current (DC) converter may include a three-phase AC filter receiving a three-phase AC power supply, a plurality of three-phase current source rectifiers (CSR) connected in parallel with each other and connected to a three-phase AC filter, and an output filter connected to the CSR's to generate a DC output. Each of the CSRs may include six switches and a free-wheeling diode. Each of the three filtered AC inputs from the three-phase AC filter may be connected via a switch of the six switches to selectably send current into a positive line, and each of three filtered AC inputs from the three-phase AC filter may be connected via another switch of the six switches to selectably receive current from a negative line. The free-wheeling diode may have a cathode connected to the positive line and an anode connected to the negative line.

Control of parallel-connected current source rectifiers

A differential output analog multiplier circuit utilizing four G-FETs, each source connected to a current source. The four G-FETs may be grouped into two pairs of two G-FETs each, where one pair has its drains connected to a load, and the other par has its drains connected to another load. The differential output voltage is taken at the two loads. In one embodiment, for each G-FET, the first and second junction gates are each connected together, where a first input voltage is applied to the front gates of each pair, and a second input voltage is applied to the first junction gates of each pair. Other embodiments are described and claimed.

Four-gate transistor analog multiplier circuit

An universal and programmable logic gate based on G-FET technology is disclosed, leading to the design of more efficient logic circuits. A new full adder design based on the G-FET is also presented. The G-FET can also function as a unique router device offering coplanar crossing of signal paths that are isolated and perpendicular to one another. This has the potential of overcoming major limitations in VLSI design where complex interconnection schemes have become increasingly problematic.

Universal programmable logic gate and routing method

The present invention relates to a reference current circuit. The reference circuit comprises a low-level current bias circuit, a voltage proportional-to-absolute temperature generator for creating a proportional-to-absolute temperature voltage (VPTAT), and a MOSFET-based constant-IC regulator circuit. The MOSFET-based constant-IC regulator circuit includes a constant-IC input and constant-IC output. The constant-IC input is electrically connected with the VPTAT generator such that the voltage proportional-to-absolute temperature is the input into the constant-IC regulator circuit. Thus the constant-IC output maintains the constant-IC ratio across any temperature range.

Wide-temperature integrated operational amplifier

Growing community of inventors

Knoxville, TN, United States of America

Benjamin J Blalock