Asynchronous marx generator utilizing photo-conductive semiconductor switches

• US 4,900,947 A
• Filed: 05/02/1988
• Issued: 02/13/1990
• Est. Priority Date: 05/02/1988
• Status: Expired due to Fees

• Current Assignee: United States Of America As Represented By The Secretary Of The Army (Government of the United States of America)
• Original Assignee: The United States Of America As Represented By The Secretary Of The Army
• Inventors: Kim, Anderson H., Weiner, Maurice, Bovino, Lawrence J.
• Primary Examiner(s): Hickey, R. J.
• Application Number:
  US07/188,933
• Time in Patent Office: 652 Days
• Field of Search: 376/105, 250/550, 250/551, 250/211 R, 307/110, 363/59, 363/60
• US Class Current: 307/110
• CPC Class Codes: H03K 17/78 using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
• CPC Class Codes: H03K 3/57 the switching device being a semiconductor device

Abstract

A Marx high voltage generator with a fast rise time. Photoconductive semiconductor switches are sequentially triggered by a single laser via fiber optic bundles of different lengths. The switches serve to series connect a group of charged capacitors. Output is taken from the last capacitor which receives the voltage accumulated on all of the previous capacitors. Proper timing of the activation of each switch produces a fast rise time.

Claims

1. A device comprising:

a plurality of means for electrostatic storage connected in parallel;

a plurality of optically controlled switches having a first optically controlled switch, said switches being connected in series between pairs of said means for electrostatic storage;

means for independently activating the plurality of serially connected, optically controlled switches in a controlled sequential manner beginning with the first switch so that each successive switch is activated upon the arrival of the voltage wavefront which is generated by the activation of the first switch and which propagates in the direction of the remaining switches.

2. The device of claim 1 wherein said switches contain semiconducting gallium arsenide and said switches further have two ohmic contacts.

3. The device of claim 1 wherein said means for electrostatic storage is a pulse forming line.

4. The device of claim 1 wherein said means for electrostatic storage is a capacitor.

5. The device of claim 1 wherein said means for activating said switches is a light source and a plurality of fiber optic bundles having a plurality of lengths so as to precisely time switch activation connected between said light source and said switches.

6. The device of claim 5 wherein said source is a YAG laser.