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Nexxim Simulator > Voltage Source, Pulsed
Pulsed Voltage Source Netlist FormatThe format for a trapezoidal pulsed voltage source is: Vxxxx n+ n- PULSE ( v1
v2 [td [tr [tf [pw [per]]]]]
) n+ and n- are the positive and negative nodes. The parameters after the PULSE keyword must be enclosed in parentheses. Parameters are positional and must be entered in the order given. To guarantee that a given parameter is interpreted correctly, all parameters to the left of it must be present.
Pulsed Voltage Source Netlist ExampleV23 23 53 PULSE (0 5 0 5ns 5ns 20ns 40ns) Notes1. The PULSE voltage source repeats the voltage waveform each period until the STOPTIME of the transient analysis is reached (see diagram below): 2. If pw is negative, per and pw are both set to infinity. 3. If per is less than (tf+tr+pw), per is set to (tf+tr+pw). 4. The AC parameter specifies the AC magnitude and phase to be applied during a small-signal AC analysis. The default for acmag is 1 Volt, the default for acphase is 0 degrees. 5. For harmonic balance (HB) analysis, the test tones must be submultiples or equal to the frequencies of the actual voltage or current inputs to the circuit. To ensure that the desired HB frequency is used with a SIN, PWL, or PULSE source, qualify the source by adding a TONE=tone_val entry at the end of the instance statement. The tone_val is then used in a subsequent HB statement. 6. The TONE entry is required with any PWL or PULSE source. For example, to analyze a mixer driven by sources at 1 MHz and 27 kHz over the first four harmonics of a PWL source and the first two harmonics of a PULSE source, the netlist syntax would be: V23 20 0 PWL(0 0 0.1e-6 2.0 0.5e-6 5.0 1.0e-6 0 R) TONE=1.0e6 V1 1 0 PULSE (0 5 0 5e-3 5e-3 27e-3 27.0e3) TONE=27.0e3 .HB TONES=(1.0e+6, 27.0e+3) MAXK=(4, 2)
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