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:
Aug. 04, 1998
Filed:
Mar. 07, 1996
Tao Zhang, Fremont, CA (US);
OmniVision Technologies, Inc., San Jose, CA (US);
Abstract
An improved method of preamplification of signals from a MOS imaging array. Each column of the imaging array includes a charge amplifier. Charge amplifiers for alternating columns are grouped together as an odd group. The remaining charge amplifiers are grouped together as an even group. The signals from the even group and the signals from the odd group are provided to a switch. The switch has two outputs: line A and line B. Lines A and B are routed to two identical second-stage amplifiers. In a first mode, the switch routes the even group to line A and the odd group to line B. In a second mode, the switch routes the even group to line B and the odd group to line A. The switch alternates between the first mode and the second mode during the vertical blanking period of an NTSC scanning scheme.