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:
Jul. 09, 2002
Filed:
Nov. 29, 2000
Wm Keith Baker, Belfountain, CA;
Sotos M. Theodoulou, Bramalea, CA;
Xerox Corporation, Stamford, CT (US);
Abstract
The present invention provides a method and a circuit for driving control electrodes between a reset voltage and an adjustable extraction voltage. The circuit includes a reset switch having first and second terminals with the first terminal being connected to a high voltage source. A plurality of set switches, each capable of assuming an on state and an off state connected such that a first terminal of each set switch is connected to a corresponding one of the control electrodes and a second terminal is connected to a low voltage source. The circuit further includes a plurality of diodes, each being connected between the second terminal of the reset switch and a corresponding one of the control electrodes. A plurality of current sources, each current source being capable of assuming an enabled and a non-enabled state, are connected between a high voltage source and a corresponding one of the control electrodes to supply a constant current to the control electrodes and thereby adjust the extraction voltage at the control electrode.