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:
Nov. 11, 1980
Filed:
May. 09, 1979
William E Coleman, Colorado Springs, CO (US);
NCR Corporation, Dayton, OH (US);
Abstract
A pair of electrodes perform both input and keep-alive functions in a plasma charge transfer device. The input-keep alive electrodes are formed on opposite walls of the device adjacent an array of transfer electrodes and are capacitively coupled to the ionization gas. (1) Repetitive and (2) selective voltage pulses are multiplexed to the input-keep alive electrodes and snychronized with transfer electrode pulsing, to provide (1) a keep-alive function and (2) the selective input of data to the charge transfer device. The erase electrodes may also be capacitively coupled to the gas. A pulsing technique is described for restoring charge neutrality to the input-keep alive electrodes and erase electrodes after each input or erase function.