The following sources are available in spice simulation. The vexp voltage source generates a waveform as shown in figure 5, where tc1 and tc2 are the time constants of the rising and falling exponentials, respectively. Ltspice tutorial wilfrid laurier university physics labs. The second waveform highlights the rise time portion. Nearly all circuits that you simulate need a voltage source of some kind. Model library pspice model library includes parameterized models such as bjts, jfets, mosfets, igbts, scrs, discretes, operational amplifiers, optocouplers, regulators, and pwm controllers from various ic vendors. Spice simulators do not like invisible or junk characters in its source file. Spice is a generalpurpose circuit simulation program for nonlinear dc, nonlinear. Input to cider consists of a spicelike description of the circuit and its compact models, and. Anyway, if you were looking for pspice for mac, you can try these applications, as these circuit simulators are also quite handy and have similar functions and features. If that doesnt suit you, our users have ranked 28 alternatives to pspice and ten of them are available for mac so hopefully you can find a suitable replacement. I find really annoying to shut down my mac and then change my partition disk to windows and then use pspice. Absolute temperature t appears explicitly in the exponential terms of the bjt and. Ngspice users manualversion 31 plusdescribes ngspice master.
Pspice voltage source from file part 1 of 2 youtube. Create a pspice voltage source that references a file as its source, learn how to make it repeat and then use the results from pspice to make a more complex input waveform. Pspice by cadence design systems, inc is a native analog and mixedsignal circuit simulator. Pspice model library includes parameterized models such as bjts, jfets, mosfets, igbts, scrs, discretes, operational amplifiers, optocouplers, regulators, and pwm controllers from various ic vendors. Ltspice features a double exponential function exp that is ideal for modeling transients via a voltage source. In ltspice, the humble voltage source rarely gets to demonstrate its. Macspice requires a textfile description of the circuit as input. Explore 8 apps like pspice, all suggested and ranked by the alternativeto.
Users may prepare netlists with a text editor, or derive them from a circuit diagram using a thirdparty schematiccapture application. Temperature appears explicitly in the exponential terms of the bjt and diode model equations. Cadence pspice technology offers more than 33,000 models covering various types of devices that are included in the pspice lite software. Popular open source alternatives to pspice for linux, windows, mac, web, software as a service saas and more. There are are some files one can use to add to their pspice library pspice models download. Macspice then builds a numerical model of the circuit and analyses this. If you find yourself in the posture of not understanding a bit of what your professor is teaching you in circuit theory class, then you should definitely try. The exp type of source is an exponential voltage, illustrated here. A floatingpoint number can be followed by an integer exponent or one of the. Vexp exponential voltage source model online documentation. The most popular mac alternative is circuit simulator, which is both free and open source. The waveforms below show the results of the above exp voltage source with an open circuit, v gen, and clamped with a tvs clamp, v in. This netlist is a list of components and the nodes they connect to. Spice source types and parameters national instruments.