Patents Represented by Attorney Bever Hoffman & Hams, LLP

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  • Active protection circuit for load mismatched power amplifier
    Patent number: 7148748
    Abstract: A peak detector detects an amplifier output overvoltage condition if the amplifier drives a mismatched load impedance. In response to the detected overvoltage condition, a clamping transistor lowers a reference DC bias voltage supplied by a bias circuit to the amplifier. The lowered reference DC bias voltage lowers amplifier gain and output power, thus protecting the amplifier.
    Type: Grant
    Filed: July 2, 2004
    Date of Patent: December 12, 2006
    Assignee: TriQuint Semiconductor, Inc.
    Inventor: Thomas R. Apel