Patents by Inventor Samual Zahnd

Samual Zahnd 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).

  • Photosensitive device with low power consumption
    Patent number: 7075130
    Abstract: A photosensitive device with a photodiode and an amplifier is disclosed. The diode is in series with a feedback transistor which forces the voltage derived from the photocurrent to be a logarithmic function of the light intensity. A current mirror is provided which controls the bias current to the amplifier to be proportional to the photocurrent. This arrangement ensures that the amplifier, just as the voltage derived from the photocurrent, becomes faster with increasing light intensity and therefore prevents an unnecessarily high power consumption at low light intensities.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: July 11, 2006
    Assignees: Eidgenossische Technische Hochschule Zurich, Universitat Zurich
    Inventors: Tobias Delbrück, Shih-Chii Liu, Samual Zahnd, Patrick Lichtsteiner
  • Photosensitive device with low power consumption
    Publication number: 20040065876
    Abstract: A photosensitive device with a photodiode and an amplifier is disclosed. The diode is in series with a feedback transistor which forces the voltage derived from the photocurrent to be a logarithmic function of the light intensity. A current mirror is provided which controls the bias current to the amplifier to be proportional to the photocurrent. This arrangement ensures that the amplifier, just as the voltage derived from the photocurrent, becomes faster with increasing light intensity and therefore prevents an unnecessarily high power consumption at low light intensities.
    Type: Application
    Filed: September 19, 2002
    Publication date: April 8, 2004
    Inventors: Tobias Delbruck, Shih-Chii Liu, Samual Zahnd, Patrick Lichtsteiner