Patents by Inventor Mohammed M. Mojaradi

Mohammed M. Mojaradi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Temperature compensated resistive circuit
    Patent number: 5107199
    Abstract: The present invention is directed to circuitry which uses a reference voltage and a reference current to produce a resistance which stays essentially constant even when the temperature of the device varies. The circuitry of a preferred embodiment consists of a resistor and a n-channel FET. The source of the FET is connected to ground, and the drain is connected to one terminal of the resistor. The other terminal of the resistor is connected to a reference current source and to the noninverting terminal of an operation amplifier. The inverting terminal of the operational amplifier is connected to a reference voltage. The output of the operational amplifier is connected to the gate of the FET. The value of the resistor is chosen such that the voltage drop across the FET (I.e., V.sub.ds) is small so that the FET operates in the linear region. A resistive element is composed of the resistor and the on-resistance of the FET.
    Type: Grant
    Filed: December 24, 1990
    Date of Patent: April 21, 1992
    Assignee: Xerox Corporation
    Inventors: Tuan A. Vo, Mohammed M. Mojaradi