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Push-pull power amplifier

  • US 5,623,231 A
  • Filed: 11/08/1995
  • Issued: 04/22/1997
  • Est. Priority Date: 09/26/1994
  • Status: Expired due to Term
First Claim
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1. A push-pull power amplifier for amplifying an input radio frequency signal, comprising;

  • an input terminal for receiving an input radio-frequency signal;

    an output terminal for outputting an amplified radio-frequency signal;

    an integrated circuit chip having a first pair of active devices, the chip having a control terminal and at least one current-carrying terminal associated with each active device, the currents flowing through the current-carrying terminals depending upon the signals applied to the control terminals;

    a substrate having a plurality of terminals, the chip being mounted with each chip terminal flip mounted onto a corresponding substrate terminal;

    an input electromagnetic coupling means formed on the substrate and having an input primary conductor electrically coupled between the input terminal and the substrate terminal corresponding to the control terminal of a first one of the pair of active devices, and an input secondary conductor electromagnetically coupled to the input primary conductor and electrically coupled between an input reference potential and the substrate terminal corresponding to the control terminal of a second one of the pair of active devices; and

    an output electromagnetic coupling means also formed on the substrate and having a primary conductor electrically coupled between the substrate terminal corresponding to one of the current-carrying terminals of the first active device and the output terminal, and an output secondary conductor mutually electromagnetically coupled to the output primary conductor and electrically coupled between the substrate terminal corresponding to one of the current-carrying terminals of the second active device and an output reference potential;

    the signal on the output terminal being a combination of the signals being conducted by the pair of active devices.

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