Patents Represented by Attorney Michael L. Sherrard

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  • Precision active rectifier circuit
    Patent number: 4030016
    Abstract: An improved feedback/compensation scheme for a precision active rectifier circuit improves the slew rate and loop gain during diode switching and thereby reduces fractional scale linearity problems.
    Type: Grant
    Filed: March 26, 1976
    Date of Patent: June 14, 1977
    Assignee: Hewlett-Packard Company
    Inventor: Joe E. Marriott
  • Low frequency triangular waveform generator
    Patent number: 4017801
    Abstract: A low frequency triangular waveform generator mixes two high frequency squarewaves having a constant frequency difference to produce a triangular waveform with a fundamental frequency equal to the difference in the fundamental frequencies of the mixed squarewaves. This generator can be adapted to produce squarewaves, sine waves, sawtooth waves, and asymmetrical triangular waves without the use of digital accumulators or ROMs.
    Type: Grant
    Filed: March 22, 1976
    Date of Patent: April 12, 1977
    Assignee: Hewlett-Packard Company
    Inventor: Ronald J. Riedel