Nanosecond pulser
First Claim
1. A pulse generator comprising:
- a driver stage comprising a plurality of solid state switches, wherein the driver stage has a stray inductance less than 300 nH, the driver stage generating;
a first input waveform having a first input frequency, a first input voltage, and a first input duration;
a transformer stage coupled with the driver stage that includes one or more transformers;
an output stage coupled with the transformer stage and galvanically isolated from a reference potential, the output stage outputting;
a first output pulse having a rise time less than 1,000 nanoseconds, a first output voltage greater than 2 kilovolts and greater than the first input voltage, and a pulse width substantially equal to the first input duration; and
a sink stage that dumps energy stored as capacitance in the output stage.
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Accused Products
Abstract
A pulse generator is disclosed that includes at least the following stages a driver stage, a transformer stage, a rectifier stage, and an output stage. The driver stage may include at least one solid state switch such as, for example, of one or more IGBTs and/or one or more MOSFETs. The driver stage may also have a stray inductance less than 1,000 nH. The transformer stage may be coupled with the driver stage and/or with a balance stage and may include one or more transformers. The rectifier stage may be coupled with the transformer stage and may have a stray inductance less than 1,000 nH. The output stage may be coupled with the rectifier stage. The output stage may output a signal pulse with a voltage greater than 2 kilovolts and a frequency greater than 5 kHz. In some embodiments, the output stage may be galvanically isolated from a reference potential.
107 Citations
20 Claims
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1. A pulse generator comprising:
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a driver stage comprising a plurality of solid state switches, wherein the driver stage has a stray inductance less than 300 nH, the driver stage generating; a first input waveform having a first input frequency, a first input voltage, and a first input duration; a transformer stage coupled with the driver stage that includes one or more transformers; an output stage coupled with the transformer stage and galvanically isolated from a reference potential, the output stage outputting; a first output pulse having a rise time less than 1,000 nanoseconds, a first output voltage greater than 2 kilovolts and greater than the first input voltage, and a pulse width substantially equal to the first input duration; and a sink stage that dumps energy stored as capacitance in the output stage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A pulse generator comprising:
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a driver stage that generates; a first input waveform having a first input frequency, a first input voltage, and a first input duration a second input waveform having a second input frequency, a second input voltage, and a second input duration, wherein the second input duration is different than the first input duration; a transformer stage coupled with the driver stage; an output stage coupled with the rectifier stage galvanically isolated from a reference potential, wherein the output stage outputs; a first output pulse having a rise time less than 1,000 nanoseconds, a first output voltage greater than the first input voltage, and a pulse width substantially equal to the first input duration; and a second output pulse having a rise time less than 1,000 nanoseconds, a second output voltage greater than the second input voltage, and a pulse width substantially equal to the second input duration; and a sink stage that dumps energy stored as capacitance in the output stage. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method comprising:
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generating a first input waveform having a first input frequency, a first input voltage, and a first input duration; outputting a first output pulse having a rise time less than 1,000 nanoseconds, a first output voltage greater than the first input voltage, and a pulse width substantially equal to the first input duration; turning off the first input waveform for a second input duration; generating a second input waveform having a second input frequency, a second input voltage, and a second input duration, wherein the second input duration is different than the first input duration; outputting a second output pulse having a rise time less than 1,000 nanoseconds, a second output voltage greater than the second input voltage, and a pulse width substantially equal to the second input duration; and sinking energy stored as capacitance in the output stage. - View Dependent Claims (20)
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Specification