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Repeater with feedback oscillation control

  • US 5,095,528 A
  • Filed: 04/11/1991
  • Issued: 03/10/1992
  • Est. Priority Date: 10/28/1988
  • Status: Expired due to Term
First Claim
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1. A self-adjusting cellular-type repeater for receiving radiated electro-magnetic signals from a remote, movable transmitter and for transmitting representations of same to a remote fixed receiver comprising:

  • means for receiving the radiated electro-magnetic signals from the remote movable transmitter at a first frequency;

    a power amplifier for amplifying at least representations of the received signals, said power amplifier including an adjustable gain parameter having an initial value;

    means, including an antenna, for transmitting representations of the amplified signals to the remote receiver at a second frequency;

    means, coupled to an output of said amplifier, for detecting an output power level in the repeater in excess of a predetermined threshold resulting form the movable transmitter moving toward said receiving means and means for adjusting said parameter in response thereto so as to reduce said output power level; and

    means, coupled to an input to said power amplifier, for monitoring said received signals and for restoring said gain parameter to said initial value after detecting a termination of the signals from the movable transmitter.

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