Patents by Inventor Tomasz Marczak

Tomasz Marczak 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).

  • Differential microphone and method for driving a differential microphone
    Patent number: 9693135
    Abstract: A differential microphone with improved biasing and a well defined common mode output voltage is connected to an amplifier that includes a differential amplifier stage and a common mode feedback circuit. The amplifier is in a feedback configuration.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: June 27, 2017
    Assignee: TDK Corporation
    Inventors: Jelena Citakovic Haas-Christensen, Tomasz Hanzlik, Ivan Riis Nielsen, Daifi Haoues Sassene, Tomasz Marczak
  • Differential Microphone and Method for Driving a Differential Microphone
    Publication number: 20150016635
    Abstract: A differential microphone with improved biasing and a well defined common mode output voltage is connected to an amplifier that includes a differential amplifier stage and a common mode feedback circuit. The amplifier is in a feedback configuration.
    Type: Application
    Filed: January 5, 2012
    Publication date: January 15, 2015
    Applicant: EPCOS AG
    Inventors: Jelena Citakovic Haas-Christensen, Tomasz Hanzlik, Ivan Riis Nielsen, Daifi Haoues Sassene, Tomasz Marczak
  • Preamplifier for two terminal electret condenser microphones
    Patent number: 6888408
    Abstract: The present invention relates to a preamplifier suitable for use with Electret Condenser Microphones such as used within telecommunication equipment. More particularly the invention relates to a preamplifier specially suited for the demands to such a preamplifier within telecommunication equipment: low input capacitance, gain and a combined terminal for output and supply voltage, thus making the preamplifier suitable for two terminal microphone assemblies. These features are obtained with a two stage amplifier with a first stage optimised for low input capacitance and the second stage being able to provide gain. The preamplifier may be implemented using an ASIC, thus making the preamplifier suitable for applications with very limited space available, such as for integration within microphone assemblies.
    Type: Grant
    Filed: August 21, 2003
    Date of Patent: May 3, 2005
    Assignee: Sonion Tech A/S
    Inventors: Claus Erdmann Fürst, Tomasz Marczak
  • Preamplifier for two terminal electret condenser microphones
    Publication number: 20040085137
    Abstract: The present invention relates to a preamplifier suitable for use with Electret Condenser Microphones such as used within telecommunication equipment. More particularly the invention relates to a preamplifier specially suited for the demands to such a preamplifier within telecommunication equipment: low input capacitance, gain and a combined terminal for output and supply voltage, thus making the preamplifier suitable for two terminal microphone assemblies. These features are obtained with a two stage amplifier with a first stage optimised for low input capacitance and the second stage being able to provide gain. The preamplifier may be implemented using an ASIC, thus making the preamplifier suitable for applications with very limited space available, such as for integration within microphone assemblies.
    Type: Application
    Filed: August 21, 2003
    Publication date: May 6, 2004
    Inventors: Claus Erdmann Furst, Tomasz Marczak