Patents by Inventor Ulrich DUEMLER

Ulrich DUEMLER 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).

  • Patent number: 10972058
    Abstract: In accordance with aspects of the present invention, embodiments of a photodiode circuit. A photodiode circuit according to some embodiments includes a transimpedance amplifier; a resistor coupled across the transimpedance amplifier; and an amplifier stage coupled to receive an output from the transimpedance amplifier, wherein the photodiode circuit provides dynamic range across a current range of the photodiode circuit. In some embodiments, the transimpedance amplifier includes a receive signal strength indicator that provides a DC current signal to a tail of a first amplifier stage, the tail providing a current that is adaptively related to the DC current. In some embodiments, the resistor is a shielded resistor. In some embodiments, the adaptive current sink includes a plurality of switchable parallel current sinks.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: April 6, 2021
    Assignee: Integrated Device Technology, Inc.
    Inventors: Ulrich Duemler, Bortecene Terlemez
  • Publication number: 20200373889
    Abstract: A programmable transimpedance amplifier (TIA) includes a plurality of signal paths between an output of a common emitter amplifier and the output of the TIA. The TIA is programmed by selecting one of the signal paths, because the paths have different parameters (e.g. different bandwidth). Thus, the bandwidth can be programmed by selecting the appropriate path. The common emitter amplifier's output is coupled to the inputs of common base amplifiers in each path. The inputs have low impedance. Therefore, having multiple paths does not significantly degrade the amplifier performance. High bandwidth can be provided.
    Type: Application
    Filed: May 22, 2019
    Publication date: November 26, 2020
    Inventors: Ulrich DUEMLER, Domenico PEPE
  • Publication number: 20190334485
    Abstract: In accordance with aspects of the present invention, embodiments of a photodiode circuit. A photodiode circuit according to some embodiments includes a transimpedance amplifier; a resistor coupled across the transimpedance amplifier; and an amplifier stage coupled to receive an output from the transimpedance amplifier, wherein the photodiode circuit provides dynamic range across a current range of the photodiode circuit. In some embodiments, the transimpedance amplifier includes a receive signal strength indicator that provides a DC current signal to a tail of a first amplifier stage, the tail providing a current that is adaptively related to the DC current. In some embodiments, the resistor is a shielded resistor. In some embodiments, the adaptive current sink includes a plurality of switchable parallel current sinks.
    Type: Application
    Filed: April 26, 2019
    Publication date: October 31, 2019
    Inventors: Ulrich DUEMLER, Bortecene TERLEMEZ