Browse Prior Art Database

High Voltage Supply

IP.com Disclosure Number: IPCOM000097364D
Original Publication Date: 1962-Oct-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Mikonis, P: AUTHOR

Abstract

The supply obtains a high voltage level. It uses an output transformer having relatively few secondary turns. There is also an output diode of relatively low peak inverse voltage rating in series with the transformer's secondary winding. The supply has chopper-amplifier unit 1 in which transistors 4 and 5 and the primary windings of saturable, square-loop transformer 6 are included in a low frequency, square wave oscillator (chopper). Transistors 4 and 5 are in the chopper to allow current from a source connected to terminals 7 to flow alternately through the upper and lower parts of the primary of 6.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 52% of the total text.

Page 1 of 2

High Voltage Supply

The supply obtains a high voltage level. It uses an output transformer having relatively few secondary turns. There is also an output diode of relatively low peak inverse voltage rating in series with the transformer's secondary winding. The supply has chopper-amplifier unit 1 in which transistors 4 and 5 and the primary windings of saturable, square-loop transformer 6 are included in a low frequency, square wave oscillator (chopper). Transistors 4 and 5 are in the chopper to allow current from a source connected to terminals 7 to flow alternately through the upper and lower parts of the primary of 6.

The position of tap 6A on the primary of transformer 6 is adjusted to give transistor 4 a longer conduction period than transistor 5. Thus, the signals produced at any of transformer 6 secondaries are asymmetrical with respect to time and magnitude. The asymmetrical signals developed at the various secondaries of 6 drive the amplifier section of unit 1 including transistors 8, 9 and
10. Series-connected transistors 8 and 9, which are included in one side of the amplifier, are driven into saturation during the longer part of each cycle of the signal produced by transformer 6 and allow current to flow from a source connected to terminals 11 through the upper part of the primary of step-up transformer 3.

Similarly, transistor 10, which is included in the other side of the amplifier, is driven into saturation during the other, shorter part of each transformer 6 cycle and allows current to flow from the terminal 11 source through the lower part of the transformer 3 primary. The number of turns in the upper part of the transformer 3 primary is greater than the number of turns in the lower part, the ratio being 4:1....