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] |
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 |
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] |
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] |
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] |
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 |
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 |
The circuit parameters corresponding to the qTBS were selected.
Mechanical change means changing the orientation or connection of the stimulation coil.