The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 2005
Filed:
Jun. 18, 2003
Giampietro Tecchiolli, Trento, IT;
Alvise Sartori, Povo, IT;
Giampietro Tecchiolli, Trento, IT;
Alvise Sartori, Povo, IT;
Neuricam SpA, Trento, IT;
Abstract
Photo-sensitive element for electro-optical sensors realised with the CMOS technology, comprising a photo-sensitive reception member () consisting of a diode connected to a conversion circuit to convert the current generated by the photo-sensitive reception member () into a tension signal, and an amplification and reading circuit (). The circuit comprises two transistors (), arranged in a diode configuration with the drain short-circuited with its own gate, the two transistors () being connected in series there between and able to perform a logarithmic conversion of the current, photo-generated by the reception member (), in continuous time and without requiring time to integrate the light. The photo-sensitive element further comprises a third transistor () having its gate connected to a photo-sensitive node () at an output of the photo-diode () to achieve a first stage of amplification in current of the signal by transferring the tension present on the node () to the drain of a fourth transistor ().