Patents by Inventor Klaus Scheiblhofer

Klaus Scheiblhofer 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).

  • Amplifier circuit with active gain step circuit
    Patent number: 6965278
    Abstract: An amplifier circuit comprises a main stage amplifier connected between a RF input and a RF output and at least one secondary stage amplifier, which is connected in parallel to the main stage amplifier between the RF input and the RF output. The secondary stage amplifier comprises an input bipolar transistor, whose collector terminal or emitter terminal is high frequency-coupled to the RF input. The secondary stage amplifier further comprises an output bipolar transistor, whose base terminal is high frequency-coupled to the base terminal of the input bipolar transistor and whose collector terminal or emitter terminal is high frequency-coupled to the RF output. The output bipolar transistor is further coupled to a supply voltage terminal.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: November 15, 2005
    Assignee: Infineon Technologies AG
    Inventors: Chih-I Lin, Klaus Scheiblhofer
  • Amplifier circuit with active gain step circuit
    Publication number: 20050024135
    Abstract: An amplifier circuit comprises a main stage amplifier connected between a RF input and a RF output and at least one secondary stage amplifier, which is connected in parallel to the main stage amplifier between the RF input and the RF output. The secondary stage amplifier comprises an input bipolar transistor, whose collector terminal or emitter terminal is high frequency-coupled to the RF input. The secondary stage amplifier further comprises an output bipolar transistor, whose base terminal is high frequency-coupled to the base terminal of the input bipolar transistor and whose collector terminal or emitter terminal is high frequency-coupled to the RF output. The output bipolar transistor is further coupled to a supply voltage terminal.
    Type: Application
    Filed: February 20, 2004
    Publication date: February 3, 2005
    Applicant: Infineon Technologies AG
    Inventors: Chih-I Lin, Klaus Scheiblhofer