SHAPED USE OF A HIGH VOLTAGE POWER SUPPLY WITH INDIVIDUAL MULTIPLIER DC OUTPUTS
Original Publication Date: 1983-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
AbstractThis disclosure relates to pin discharge devices and more particularly to the use of a single high voltage power supply with a plurality of discharge devices of the type used in the xerographic process while simultaneously providing for measurement and control of the individual discharge devices.
XEROX DISCLOSURE JOURNAL
U.S. Cl. 355/3CH Int. Cl. G03g 15/00
~~ Morton Silverberg
This disclosure relates to pin discharge devices and more particularly to the use of a single high voltage power supply with a plurality of discharge devices of the type used in the xerographic process while simultaneously providing for measurement and control of the individual discharge devices.
Disclosed in the figure is a circuit diagram 10 of the presently contemplated implementation of the concept. As disclosed therein, the circuit comprises a high voltage transformer 12 having a secondary winding 14 to which there are connected a plurality of pin discharge devices 16 (only one being shown). The. high voltage transformer drives capacitors 18, 20, and 22, etc., there being one such capacitor for each DC discharge device 16 used. Since the electrical components associated with each discharge device are the same only those associated with only one device 16 will be discussed hereinbelow.
Volume 8 Number 5 September/October 1983 42 1
SHARED USE OF A HIGH VOLTAGE POVER SUPPLY WITH INDIVIDUAL MULTI- DC OUTPUTS (Cont'd)
The capacitor 18 drives a voltage doubler diode pair represented by reference characters 24 and 26. It will be appreciated that higher order voltage multipliers are also contemplated. The basic action is to cause a DC current to flow between a pin device, for example, 16 and a ground connection 28. By couDling the conductive shield 30 as shown, a net DC current is caused to flow through a resistor 32 which equals the net current delivered to the pin device 16. Thus, the delivered DC current can be measured by sensing the voltage at top 34. A capacitor 36 serves to fi...