University of Texas System

Cirasys, Inc.

Poras T Balsara

Louis Roberts Hunt

Kamal J Koshy

Robert Jewell Taylor

Vikas V Paduvalli

Kamran Kiasaleh

Dinesh Kumar Bhatia

A voltage converter for converting an input voltage to an output voltage is disclosed. The voltage converter includes a voltage converter circuit having a set of switches, a switch driver connected to the voltage converter circuit, a controller connected to the switch driver and the output voltage, a target output voltage connected to the controller, a control signal generated by the controller for the switch driver that includes a duty ratio based on the target output voltage and the output voltage. The switch driver is configured to apply the control signal to the set of switches and the voltage converter circuit generates the output voltage based on the duty ratio to match the target output voltage.

Analog input output linearization control

An apparatus and method is presented for implementing and controlling a voltage converter with one input voltage and multiple output voltages. In the case of boost and buck-boost converters, a converter circuit with one inductor and a switched group of parallel connection capacitors is realized, one parallel connection for each output voltage. A duty ratio is monitored for the inductor and the switched group of capacitors to provide a set of duty ratios. The duty ratios form a control vector which describes the control inputs. The output voltages are the control outputs describing a MIMO system. A generalized Cuk-Middlebrook modeling approach is applied to the voltage converter, along with linearization and MIMO control methods to regulate all output voltages to desired levels.

System, apparatus and methods for controlling multiple output converters

The present invention provides a software defined radio transceiver that includes a programmable cellular radio front end and a programmable baseband processor. The programmable cellular radio front end is typically a digital radio frequency processor configured to support a cellular communication standard. The programmable baseband processor is connected to the digital radio frequency processor. The programmable baseband processor (a) selectively reconfigures the cellular configured digital radio frequency processor to support a non-cellular communication standard by bypassing one or more cellular communication standard specific function, and modifying one or more operating parameters to conform to the non-cellular communication standard, (b) processes input data in accordance with the non-cellular communication standard and provides the processed input data to the digital radio frequency processor for transmission, and (c) receives output data from the digital radio frequency processor and processes the received output data to obtain transmitted data.

System, method and apparatus for providing communications that conform to a cellular communication standard and a non-cellular communication standard

Circuit designs of basic digital logic gates are disclosed using Resonant Tunneling Diodes (RTDs) and MOSFETs, which reduces the number of devices used for logic design, while exploiting the high speed negative differential resistance (NDR) characteristics of RTDs. Such logic circuits include NAND, NOR, AND, and OR gates and Minority/Majority circuits, which are used in full adder circuits. By implementing RTDs along with conventional MOSFETs, the use of series connected MOSFETs, which results in low output rise and fall times, especially for a large number of inputs, can be avoided. Furthermore, the RTD logic design styles do not require the use of resistors or any elaborate clocking or resetting scheme.

Growing community of inventors

Plano, TX, United States of America

Poras T Balsara