Patents by Inventor Maarten Wilhelmus Henricus Marie van Dommelen

Maarten Wilhelmus Henricus Marie van Dommelen 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).

  • Control of a microphone
    Patent number: 9161123
    Abstract: A microphone circuit has a clip detection circuit which detects when an analogue to digital converter output has reached a threshold. A variable attenuator is controlled based on the clip detection circuit output. The feedback is thus based on the ADC output level, and the processing of this signal can be implemented without requiring baseband processing of the signal—it can simply be based on a state of the ADC output. An overrule function is also provided so that the clip detection AGC control can be inhibited or controlled differently.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: October 13, 2015
    Assignee: NXP B.V.
    Inventors: Han Martijn Schuurmans, Maarten Wilhelmus Henricus Marie Van Dommelen
  • CONTROL OF A MICROPHONE
    Publication number: 20130259242
    Abstract: A microphone circuit has a clip detection circuit which detects when an analogue to digital converter output has reached a threshold. A variable attenuator is controlled based on the clip detection circuit output. The feedback is thus based on the ADC output level, and the processing of this signal can be implemented without requiring baseband processing of the signal—it can simply be based on a state of the ADC output. An overrule function is also provided so that the clip detection AGC control can be inhibited or controlled differently.
    Type: Application
    Filed: March 13, 2013
    Publication date: October 3, 2013
    Applicant: NXP B.V.
    Inventors: Han Martijn SCHUURMANS, Maarten Wilhelmus Henricus Marie VAN DOMMELEN
  • CIRCUIT AND METHOD FOR MONITORING A CAPACITIVE SIGNAL SOURCE
    Publication number: 20120043974
    Abstract: A circuit for monitoring capacitive signal sources, and particularly detecting changes in capacitance of a variable capacitor, comprises the capacitive signal source and a differential analogue to digital converter. A voltage source provides a DC voltage to a first terminal of the differential analogue to digital converter, and the capacitive signal source is connected to the other terminal of the differential analogue to digital converter. A feedback path low pass filters the output of the differential analogue to digital converter to derive a DC offset value and couples the DC offset value to the other terminal of the differential analogue to digital converter.
    Type: Application
    Filed: August 16, 2011
    Publication date: February 23, 2012
    Applicant: NXP B.V.
    Inventors: Jeroen van den Boom, Maarten Wilhelmus Henricus Marie van Dommelen, Han Martijn Schuurmans