Patents by Inventor Robert M. Haigler

Robert M. Haigler 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).

  • Electronic circuit for sensing disconnect or failure of a power output sense line in an audio power system
    Patent number: 4887298
    Abstract: A detection circuit for detecting the failure or disconnection of a sense line in an audio processing system that provides an audio output signal that drives the input of an audio power amplifier. The audio power amplifier drives a speaker. The audio processing system includes an input for receiving a first feedback signal on a sense line from the output of the power amplifier. The audio processing system is responsive to the first feedback signal to control the amount of power provided to the input of the power amplifier and thus to the speaker. The detection circuit also receives the first feedback signal. The detection circuit further receives a second feedback signal from the output of the audio processing system prior to the input of the power amplifier. The magnitude of the second feedback signal is compared to the magnitude of the first feedback signal to determine whether the sense line is providing the first feedback signal from the output of the power amplifier.
    Type: Grant
    Filed: June 15, 1988
    Date of Patent: December 12, 1989
    Assignee: Renkus-Heinz
    Inventor: Robert M. Haigler