US 12,465,775 B2
Apparatuses and methods for limiting load current in nanosecond pulsed power sources
Chaofeng Huang, San Jose, CA (US); Gregory P. Schaadt, Santa Clara, CA (US); and Kenneth R. Krieg, Fremont, CA (US)
Assigned to Pulse Biosciences, Inc., Hayward, CA (US)
Appl. No. 17/633,676
Filed by PULSE BIOSCIENCES, INC., Hayward, CA (US)
PCT Filed Sep. 29, 2020, PCT No. PCT/US2020/053248
§ 371(c)(1), (2) Date Feb. 8, 2022,
PCT Pub. No. WO2021/067255, PCT Pub. Date Apr. 8, 2021.
Claims priority of provisional application 62/909,187, filed on Oct. 1, 2019.
Prior Publication US 2022/0313990 A1, Oct. 6, 2022
Int. Cl. A61N 1/378 (2006.01); H01B 11/18 (2006.01)
CPC A61N 1/378 (2013.01) [H01B 11/18 (2013.01)] 25 Claims
OG exemplary drawing
 
1. An apparatus for delivering nanosecond pulsed electrical energy comprising:
a nanosecond pulse generator configured to provide at least a high voltage pulsed output having a maximum pulse duration of up to 1000 ns;
a transmission cable coupled to the nanosecond pulse generator at a first end, the transmission cable having a characteristic impedance (Z0) and a characteristic pulse speed (v), wherein the transmission cable has a length between the first end and a second end that is greater than or equal to F times of the maximum pulse duration (in ns) divided by the characteristic pulse speed on the transmission cable (in ns/ft), wherein F is between 0.1 and 0.5; and
a pulse delivery output, wherein the pulse delivery output couples to the second end of the transmission cable.