eldo_user

Examples
Example 5—Transient Analysis of a Colpitts Oscillator
The above lines define the voltage sources in the circuit. A DC voltage source v1 connected
between the nodes 1 and 0 of value 5V and also a DC voltage source between the nodes 4 and 0
of value −5V.
i1 2 4 pulse(0 10u 0 5n 5n 25n 50n)
This line defines a time dependent pulse function between nodes 2 and 4 describing the
following signal:
0 A at 0s (delay time is 0s)
0 A to 10μA in a rise time of 5ns
10μA from 5 to 30ns (pulse width is 25ns)
10μA to 0A in a fall time of 5ns
0 A at 35ns
Cycle repeats starting from 50ns.
.option eps=1.0e-6
The above line sets the simulator accuracy.
.TRAN 1u 12u
The above specifies a transient analysis is to be performed lasting 12μs with a plotting
increment of 1μs.
.plot tran v(1,3) (10,-10)
The above line specifies a voltage/time plot to be performed of the voltage difference between
the nodes 1 and 3 between the limits ±10V.
Eldo® User's Manual, 15.3 1285