![]() ![]() #Macspice update codeThe uncorrected Berkeley code uses the larger of these values, and therefore calculates at fewer time points. MacSpice uses the smaller of TSTEP or (TSTOP-TSTART)/50.0, as specified in the Spice 3f5 User's Guide. One example arises when the TMAX specification is omitted from transient analysis. Competitors often benefit because they contain bugs that have been fixed in MacSpice. It probably doesn't, at least not when the comparison is done fairly. ![]() Why does this release run slower than another Spice? The 'Close' action changes to 'Close All' when the 'option' modifier key is pressed. key combination by pressing the 'Apple' key simultaneously with the 'full stop' key. However, it does have a half-sister called WinSpice which is also derived from Berkeley 3f4 but by a different developer – Mike Smith. * xcircuit (Open Source) also available as MacPorts or Fink packages #Macspice update windows* Magic VLSI Editor (Compiles for X Windows under Xdarwin) * Electric VLSI Design System (Open Source) If you need schematic capture, you may wish to consider: MacSpice is a Spice simulator, not a schematic capture application. Why does MacSpice require netlists and not have graphical schematic entry? A real resistor has parasitic inductance and capacitance if these have a significant influence on the circuit, they must be added explicitly to the netlist. Within Spice most devices are ideal – its resistor, for example, has just one property: resistance. The quality of the results depends on the accuracy of the netlist and the device models use. The high quality of the MacSpice command interpreter makes the automation of tasks straightforward. MacSpice then builds a numerical model of the circuit and analyses this.Ī command interpreter (shell) is used to specify the types of analyses that are required and how the results should be processed, saved or displayed. Users may prepare netlists with a text editor, or derive them from a circuit diagram using a third-party schematic-capture application. This 'netlist' is a list of components and the nodes they connect to. MacSpice, like most circuit simulators, requires a text-file description of the circuit as input. It is usually cheaper and quicker to simulate a design than to build a prototype. For example: the memory leaks that affected Spice 3f4 have been cured new algorithms have been developed to facilitate the simulation of large circuits, and to reduce simulation time MacSpice provides a robust multi-parameter optimizer and facilities for inter-process communication with other applications.Ĭircuit simulation is a way of building and testing virtual models of electronic devices. MacSpice incorporates many improvements to Spice 3f5 – from simple bug-fixes to entirely new commands, algorithms and solution strategies. It is derived from, and compatible with, Berkeley Spice 3f5. MacSpice has native support for both PowerPC and Intel architecture Apple Macintosh computers. It is used at various universities internationally for research and teaching. It has users who range in experience from school-age enthusiasts to retired integrated circuit designers. MacSpice simulates and analyses electronic circuits that can range in complexity from a single resistor to an integrated circuit comprising tens-of-thousands of devices. ![]()
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