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:
Sep. 08, 2009
Filed:
Feb. 17, 2003
David J. Gulbransen, Santa Barbara, CA (US);
Christopher L. Fletcher, Santa Barbara, CA (US);
David J. Gulbransen, Santa Barbara, CA (US);
Christopher L. Fletcher, Santa Barbara, CA (US);
Raytheon Company, Waltham, MA (US);
Abstract
A unit cell () is disclosed that has an input node for coupling to an output of a detector (D) of electromagnetic radiation, such as IR or visible radiation. The unit cell includes a first capacitor (C) switchably coupled to the input node for receiving a charge signal from the detector, and for integrating the charge signal during a first integration period, as well as a second capacitor (C)switchably coupled to the input node for integrating the charge signal during a second integration period. The unit cell further includes an output multiplexer () for selectively coupling the first capacitor and the second capacitor to an output signal line () during respective charge signal readout periods. In the preferred embodiment a duration of the first integration period is one of greater than or less than the second integration period, and the first integration period is one of non-overlapping or overlapping with the second integration period, and vice versa. The first integration period can be interleaved with the second integration period, or vice versa.