Patents Represented by Attorney Steven J. Parmalee

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  • Speech detector for automatic level control systems
    Patent number: 4975657
    Abstract: A speech detection circuit uses a peak detector and a valley detector including offset voltages to reliably detect the absence or presence of speech at audio base band level. This circuit provides a pulse train output when speech is detected which may be used to control an automatic gain control circuit.
    Type: Grant
    Filed: November 2, 1989
    Date of Patent: December 4, 1990
    Assignee: Motorola Inc.
    Inventor: Bruce C. Eastmond