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HIGH VOLTAGE STABILIZATION CIRCUIT

IP.com Disclosure Number: IPCOM000025683D
Original Publication Date: 1987-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 4 page(s) / 110K

Publishing Venue

Xerox Disclosure Journal

Abstract

Corotron charging units have been utilized for depositing an electrosYatic charge on a surface in numerous applications including electrostatographic and migration imaging systems. For certain applications of corona charging, it is important that a constant current and charging potential be maintained between corotron wire and a metal shield surrounding the corotron wire. A high voltage stabilization circuit has been developed which comprises elements specific for: (1) monitoring the charge potential of the high voltage supply, (2) creating a dynamic error offset proportional to the desired potential and, (3) maintaining the desired output to the high voltage supply with overload protection. This high voltage stabilization circuit is illustrated in the accompanying diagram. The circuit contains the following components:

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XEROX DISCLOSURE JOURNAL

HIGH VOLTAGE STABILIZATION Proposed Classification CIRCUIT U.S. Cl. 355/3 Terrence H. Milkie
Int. Phillip H. Soden C1. G03g 15/00

I

1

Corotron charging units have been utilized for depositing an electrosYatic charge on a surface in numerous applications including electrostatographic and migration imaging systems. For certain applications of corona charging, it is important that a constant current and charging potential be maintained between corotron wire and a metal shield surrounding the corotron wire. A high voltage stabilization circuit has been developed which comprises elements specific for: (1) monitoring the charge potential of the high voltage supply, (2) creating a dynamic error offset proportional to the desired potential and, (3) maintaining the desired output to the high voltage supply with overload protection. This high voltage stabilization circuit is illustrated in the accompanying diagram. The circuit contains the following components:

Volume 12 Number 2 March/April 1987 35

[This page contains 1 picture or other non-text object]

Page 2 of 4

HIGH VOLTAGE STABILIZATION CIRCUIT (Cont'd)

Element No.

IC2a IC2b I C3

22

23

P1 c5

R 10 R11 R%2 R13 R14 R15 R16 R17

R 18

R 19 c7 C8

M

Element Description Manufacturer

TL082C T.I. TL082C T.I. LM723CN Nat.Semiconductrs Zener Diode (IN52428) I .R.

Zener Diode (IN5242B) I.R. High Voltage Converter (PMS5-5C-2) Capacitor 0.001~1F (00-102) Centralab Metal Film Res. 390Q-l/2W (MR-30F) Philips Metal Film Res. 390Q-l/2W (MR-30F) Phi 1 ips Metal Film Res. 20KQ-l/4W (MR-25F) Philips Metal Film Res. lOKQ-l/4W (MR-25F) Philips Metal Film Res. 18KQ-l/4W (MR-25F) Philips Metal Film Res. 10KQ-l/4W (MR-25F) Philips Metal Film Res. 4.02KQ-l/4W (MR-25F) Philips Metal Film Res. 10KQ-l/4W (MR-25F) Phil ips Trim Pot. lOKQ (3299P-1-103) Bourns Metal Film Re...