It is assumed that the excitation digital signal U1 is a trapezoidal pulse
of amplitude 2.5 V, rise/fall times of 0.5 nsec and pulse width of 4.5 nsec.
The first factor, called [P.sub.o](t), is recognized  as a trapezoidal pulse
Duration of trapezoidal pulse [T.sub.p] = [[tau].sub.1] + [[tau].sub.2], amplitude is A and shape can be determined by shape parameter [k.sub.s]
Now we have fully defined trapezoidal pulse [p.sub.t](t) trough three parameters [[tau].sub.1], [[tau].sub.2] and A.
Firstly a spectrum of trapezoidal pulse must be calculated.
Using theorem (3) on equation (1) we obtain spectral density of trapezoidal pulse
The corresponding frequency response for a trapezoidal pulse
is shown as
The cellular effects of PEMFs on the response of human Saos-2 osteosarcoma cells to discs of porous bovine natural apatite were investigated by Fassina et al., who exposed cells to 1.3 ms trapezoidal pulses at 75 Hz, 2 mT in bioreactors for 24 hours/day for 22 days .
Saos-2 cells were used as a model of osteoblastic cells on titanium fiber-mesh scaffolds and continuously stimulated with 1.3 ms trapezoidal pulses at 75 Hz, 2 mT in bioreactors for 22 days.
The time domain on-off processes of MOSFET can be described as trapezoidal pulses
Already the results for trapezoidal pulses
start to increase rapidly if the side slopes of those pulses become more abrupt.
These pulses are called bandlimited Nyquist pulses, as exemplified by raised cosine and trapezoidal pulses
.  The use of root raised cosine pulses  combines Nyquist data transmission with matched filtering against additive white Gaussian noise (AWGN).