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Nexxim Simulator > Current Source, Pulsed
Pulsed Current Source Netlist FormatThe format for a trapezoidal pulsed current source is: Ixxxx 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. Note that all parameters are required to be present in the order given.
The PULSE current source repeats the current waveform each period until the STOPTIME of the transient analysis is reached (see diagram below):
The AC parameter specifies the AC magnitude and phase to be applied during a small-signal AC analysis. The default for acmag is 1 Amp, the default for acphase is 0 degrees. 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. The TONE keyword is needed with a SIN voltage or current source only when the driving frequency of the source differs from the frequency at which the harmonic balance is to run. For example, to analyze a circuit driven by a single 1-KHz AC current source using harmonic balance at a test tone of 1 KHz over the first 31 harmonics, the netlist would be simply: I1 1 0 SIN(0 1000 0 0) .HB TONES=1000 MAXK=31 However, to specify a 1000-Hz tone for harmonic balance while driving the circuit with a 2000-Hz sinusoidal current, the voltage source statement should include the TONE specification: I1 1 0 SIN(0 2000 0 0) TONE=1000 .HB TONES=1000 MAXK=31 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: I23 20 0 PWL(0 0 0.1e-6 2.0 0.5e-6 5.0 1.0e-6 0 R) TONE=1.0e6 I1 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) Pulsed Current Source Netlist ExampleI23 23 53 PULSE (0 .05 10ns 5ns 5ns 20ns 40ns) HFSS视频教程 ADS视频教程 CST视频教程 Ansoft Designer 中文教程 |
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