Nanosecond pulsed power sources having multi-core transformers
AssigneePulse Biosciences, Inc.
InventorsChaofeng Huang, Gregory P. Schaadt, Kenneth R. Krieg
Life of this patent
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Abstract
Described herein are apparatuses and methods for applying high voltage, sub-microsecond (e.g., nanosecond range) pulsed output to a biological material, e.g., tissues, cells, etc., using a high voltage (e.g., MOSFET) gate driver circuit having a high voltage isolation and a low inductance. In particular, described herein are multi-core pulse transformers comprising independent transformer cores arranged in parallel on opposite sides of a substrate. The transformer cores may have coaxial primary and secondary windings. Also describe are pulse generators including multi-core pulse transformers arranged in parallel (e.g., on opposite sides of a PCB) to reduce MOSFET driver gate inductance.
Claims24
An apparatus for delivering sub-microsecond pulsed electrical energy comprising:
- one or more high voltage switch drivers;
- one or more high voltage switches;
- and
- one or more multi-core pulse transformers, wherein each multi-core pulse transformer comprises a first transformer core and a second transformer core that are arranged in parallel between the one or more high voltage switch drivers and the one or more high voltage switches, wherein the first transformer core and the second transformer core each include one or more cables forming primary and secondary windings, wherein the primary and secondary windings are coaxially arranged relative to each other;
- further wherein the one or more high voltage switch drivers are coupled to the primary windings and the one or more high voltage switches are coupled to the secondary windings.
An apparatus for delivering sub-microsecond pulsed electrical energy comprising:
- one or more MOSFET drivers;
- one or more MOSFETs;
- and
- one or more multi-core pulse transformers, wherein each multi-core pulse transformer comprises a first transformer core and a second transformer core that are arranged in parallel between the one or more MOSFET drivers and the one or more MOSFETs so that the first transformer core is on a first side of a substrate and the second transformer core is on a second side of the substrate in parallel with the first transformer core;
- further wherein the one or more MOSFET drivers are coupled to a primary winding from each of the first and second transformer core, and the one or more MOSFETs are coupled to a secondary winding from each of the first and second transformer core, wherein the primary and secondary windings are coaxially arranged relative to each other.
A method of generating a sub-microsecond pulsed output, the method comprising:
- emitting a driving pulse from a high voltage switch driver to a multi-core pulse transformer through a primary winding of a first transformer core and a primary winding of a second transformer core, wherein the first and second transformer cores are arranged in parallel;
- and
- receiving the driving pulse at a high voltage switch from a secondary winding arranged coaxially relative the primary winding around the first transformer core and the second transformer core;
- wherein the driving pulse is a sub-microsecond driving pulse.
Dependencies are inferred from the claim text.