Hello again !
OK
from page 201 in the Tutorial
“An important detail is the (red marked) power supply:
An oscillator simulation needs a “startup push” and this is done by programing the supply voltage as a
ramp signal.
Vdd starts at time t = zero with a value of zero Volts and stays so up to 10 μs.From t = 10μs to t = 20μs the
amplitude rises linearly up to +12 V and stays afterwards on this value.
Therefore a “ramp.csv” file (= comma separated value file) must be written to use a “data based voltage
source” (= PWL source = piecewise linear voltage source). This file must be saved in your actual
oscillator project folder:
0 0
10e-6 0
20e-6 12V
40e-6 12V ”
…and now high lighted in the my pdf showing the simulation, the content in the ramp.csv file
GL – 73 – Hannes – SM6PGP
