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:
Jan. 14, 2003
Filed:
Sep. 15, 2000
Stephen Collins, Oxford, GB;
Gillian F Marshall, Malvern, GB;
Qinetiq Limited, London, GB;
Abstract
A buffer circuit includes a MOSFET source follower (M ) and a floating gate MOSFET (MFG ) connected in series with the phototransistor (PT ) to control current through it at an input circuit node (D ). The source follower (M ) buffers the phototransistor (PT ), having a gate (G ) connected to its emitter (PC ). The floating gate (F ) is programmable with charge to preset the phototransistor current under prearranged illumination conditions to counteract unwanted signal contributions (e.g. fixed pattern noise) or non-optimum circuit characteristics. The floating gate MOSFET (MFG ) may alternatively be connected in series with the source follower output (D ) to control current at an output circuit node. The circuit may be a member of a pixel circuit array and may include programming circuitry (M , M ) to select it for programming and to isolate it to enable other array members to be programmed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile