Patents Represented by Attorney James J. Winstead Sechrest & Minick J. P. Violette, Esq. Cirrus Logic, Inc. Murphy, Esq.

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  • Bias current calibration of voltage controlled oscillator
    Patent number: 5907263
    Abstract: A voltage controlled oscillator with bias current calibration includes a voltage controlled oscillator 1504. A tuning current source 1510 is coupled to oscillator 1504 in parallel with bias current source 1512 for providing a tuning current to oscillator 1504. A selected control voltage is provided by oscillator 1504 for setting an oscillator output frequency. Control circuitry 1513, 1514 allows adjusting of the tuning current source to optimize bias current.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: May 25, 1999
    Assignee: Cirrus Logic, Inc.
    Inventors: James Divine, Jeffrey Niehaus, John Pacourek, Baker Scott, III