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Amplifier for receive mode operation

  • US 4,063,175 A
  • Filed: 08/05/1976
  • Issued: 12/13/1977
  • Est. Priority Date: 08/05/1976
  • Status: Expired due to Term
First Claim
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1. An amplifier circuit adapted to be interposed between an antenna and a communications device such as a radio, scanner, transceiver or the like to amplify incoming signals comprising:

  • an input terminal to receive incoming signals from said antenna;

    an output terminal to couple amplified signals to said communications device;

    a current divider for dividing incoming signals into first and second portions, said first portion being coupled directly from said input terminal through said current divider to said output terminal;

    a current amplifier including a pair of cascaded transistors to receive incoming signals from said second portion of said current divider and for amplifying said signals and coupling said signals to the output terminal of said amplifier circuit; and

    a filter network, coupled to said current amplifier, for bypassing to ground electrical noise, such as engine ignition noise and alternator noise, when the amplifier circuit is utilized in a mobile installation.

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