Patents by Inventor Anand D. Kudari

Anand D. Kudari 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).

  • Oscillator circuit with variable reference voltage and current
    Patent number: 7034627
    Abstract: A relaxation oscillator circuit is configured to provide an output signal. The relaxation oscillator circuit includes two capacitors that are alternatively charged and discharged. Each capacitor is charged by a separate current that is provided by mirroring a reference current. The reference current for the current mirror may be provided by a bias circuit such that the reference current may vary significantly over temperature and supply voltage. Also, the reference current is mirrored to a resistor to provide the reference voltage. The resistor has a temperature coefficient that is substantially zero. Accordingly, the output signal is relatively independent of temperature and supply voltage, even though the reference current and the reference voltage may vary significantly over temperature and supply voltage.
    Type: Grant
    Filed: April 1, 2004
    Date of Patent: April 25, 2006
    Assignee: National Semiconductor Corporation
    Inventor: Anand D. Kudari