c7f02827-28c2-476a-8a68-e0ab4c32c5a3 28 Martin Kraska 4 5 false false 0 0 decimal

&[DATE] &[TIME] - &[FILENAME]

T.s 1 μs * :

D 0.3 :

I.peak 1 mA * :

t i I.peak t T.s / 1 mod D < 0 cases :

0.2 μs * i 0.001 A *

The function is defined using the cases() function from the Customfunctions plugin.

t μs * i mA /

# # # cases

The current i(t) defined above is used as excitation source for the circuit below.

R1 1000 Ω * :

C1 10 nF * :

Define a voltage for the unknown node Vc(t). Current in the resistor can be calculated i.R(t)

t i.r1 t V.C R1 / ≡

Kirchoffs current law will give the charging current for the capacitor

t i.c1 t i t i.r1 - ≡

which then defines an ODE

t V.C t diff 1 C1 / t i.c1 * ≡

t V.C DV.C 1 C1 / t i t V.C R1 / - (* :

V.C t DV.C 1 C1 / t i V.C R1 / - (* :

Define the integration step.

dt .1 μs * :

h1 1.5 dt * :

h2 0.5 dt * :

T 20 μs * :

Define the duration of the simulation.

t V.C Clear 1

V.C0 0 V * :

V.C 1 el 0 V * :

V.C 2 el V.C0 :

t 1 el 0 s * :

t 2 el 0 s * :

N T dt / Floor : 200

ι 2 N range t ι 1 + el t ι el dt + : V.C ι 1 + el V.C ι el h1 V.C ι el t ι el DV.C * + h2 V.C ι 1 - el t ι 1 - el DV.C * - eval : 21 line for

t 2 N range el μs / V.C 2 N range el V / augment