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. Author manuscript; available in PMC: 2021 Apr 14.
Published in final edited form as: IEEE Trans Biomed Eng. 2020 Sep 18;PP:10.1109/TBME.2020.3024902. doi: 10.1109/TBME.2020.3024902

Table II. Comparison Between the Implemented pTMS and Other Structures for Set Hardware Configuration.

Ref. Circuit structure Stimulus voltage and current shape Specifications of the stimulus Specifications of the circuit
Resonant based circuits Flex TMS [7] graphic file with name EMS107447-i001.jpg graphic file with name EMS107447-i002.jpg Shape: Near sinusoidal monophasic and biphasic
Maximum positive pulse width: 50 μs
Maximum negative pulse width: 50 μs
Polarity adjustment: Electrical
CES (DC link) = 66 μF
VDC (max) = 2.2 kV
Icoil (Max) = 5 kA
⧍WCES = 20.2 J
[41]a graphic file with name EMS107447-i003.jpg graphic file with name EMS107447-i004.jpg Shape: Static cosine shape
Pulse frequency: 4.97 kHz
Polarity adjustment: Mechanicalb
CES (DC link) = 66 μF
VDC (max) = 720 V
Ic oil (Max) = 1.66 kA
⧍WCES = 10.8 J
Switching based circuits cTMS1 [4] graphic file with name EMS107447-i005.jpg graphic file with name EMS107447-i006.jpg Shape: Near rectangular, monophasic
Maximum positive pulse width: 165 μs
Polarity adjustment: Mechanicalb
CES (DC link) = 716 μF
VDC (max) = 1.65 kV
Icoil (Max) = 6 kA
⧍WCES = 284.5 J
cTMS2 [5] graphic file with name EMS107447-i007.jpg graphic file with name EMS107447-i008.jpg Shape: Near rectangular monophasic and biphasic
Maximum positive pulse width: 168 μs
Maximum negative pulse width: 338 μs
Polarity adjustment: Mechanicalb (for the maximum output)
CES (DC link1) = 740 μF
CES (DC link2) = 3 mF
VDC1 (max) = 2.8 kV
VDC2 (max) = 1 kV
Icoil (Max) = 7 kA
⧍WCES = 49 J
cTMS3 [6] graphic file with name EMS107447-i009.jpg graphic file with name EMS107447-i010.jpg Shape: Near rectangular, monophasic and biphasic
Maximum positive pulse width: 128 μs
Maximum negative pulse width: 276μs
Polarity adjustment: Mechanicalb (for the maximum output)
CES (DC link1) = 430 μF
CES (DC link2) = 2 mF
VDC1 (max) = 2.6 kV
VDC2 (max) = 1 kV
Icoil (Max) = 6 kA
⧍WCES = 37.6 J
pTMs graphic file with name EMS107447-i011.jpg graphic file with name EMS107447-i012.jpg Shape: PWM, monophasic and biphasic
Maximum positive pulse width: 618 μs
Maximum negative pulse width: 618 μs
Polarity adjustment: Electrical
CES (DC link) = 10 mF
VDC (max) = 1 kV
Ic oil (Max) = 3.6 kA
⧍WCES = 73.1 J
a)

The circuit parameters corresponding to the qTBS were selected.

b)

Mechanical change means changing the orientation or connection of the stimulation coil.