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Micro-Cap Electronic Analog/Digital Circuit Analysis Program
Micro-Cap Electronic Analog/Digital Circuit Analysis Program
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Old 24th June 2004, 07:18 AM   #1
Franklin is offline Franklin
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Join Date: May 2002
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Default Micro-Cap Electronic Analog/Digital Circuit Analysis Program

Micro-Cap 5 versie 2.02 Electronic Analog and Digital Circuit Analysis Program.

Asking: EUR 199. Buyer pays shipment.

- 1 CD-Rom + (7 FDs)
- Reference Manual (552 blz)
- User Guide (206 blz)
- Hardware Dongle

Upgrade to current version is possible.


Performance Plotting

Micro-Cap 5 provides a group of functions for measuring performance related curve characteristics. These functions let you measure performance related values such as rise time, fall time, pulse width, frequency, period, and many others. These functions also exist for use in cursor mode, in order to quickly place the cursors across a desired measurement. Common usage of the performance plotting feature would occur in an analysis that contains temperature stepping or component stepping.

3D Plotting

Another method for displaying information from a multiple run analysis in Micro-Cap 5 is through 3D plotting. 3D plotting lets you display a plot of three of the variables at the same time. Instead of a single measurement, such as in the performance plot, you can view all of the data in relation to one another. This display method would also be most commonly used in the case of stepping components or stepping temperature. The appearance of the plot may be altered by the user. The 3D plot may be rotated by mouse or by keyboard. The X, Y, and Z views may all be profiled. The color of the plot is controlled by the user, and it may vary from a spectrum of colors, to a single color, to a wire mesh representation of the plot. Instead of the standard 3D plot, a contour plot may also be produced with the same information.


First of all, symbolic stepping has been added. Any variable that is defined through a .define or a .param statement may now be stepped. This gives you the power to step constants in an equation, or to step multiple parameters that reference the same value. For example, the P2 and P3 parameters of a pulse source may be defined with the same symbolic name. Stepping this name would let you step the peak of a triangle source. A second feature added was to include a List method along with the standard Log and Linear methods. The List method lets you place a list of values into the Stepping dialog box that the parameter will be stepped through. Any set of values may be stepped now instead of having to have it be linearly or logarithmically related. The final feature added was to include the capability of stepping multiple parameters. Micro-Cap 5 may step up to 10 parameters in the same analysis. These parameters may be stepped in either a nested or simultaneous mode. Any combination of component parameters, model parameters, or symbolic parameters may be stepped together.

Larger Model Library

The device model library has more than 10.000 parts. The digital library over 100 ECL parts from National and Motorola. The analog library has European and Japanese diodes and transistors along with current regulators from Motorola. Vendor supplied subcircuits include sensors from Motorola, varistors from Siemens, MosFETs from Harris, and IGBTs from International Rectifier.

New Device Models

New device models are z-transform sources and a sample and hold element. Also added in the BSIM are MosFET models. The BSIM levels added are BSIM1, BSIM2, and BSIM3 Version 3.


Click on the schematic to call up a waveform. Full control of the placement and visual attributes of the waveform.

Improved Waveform Controls

Micro-Cap 5 offers a lot more capabilities in manipulating a waveform after it has been plotted. These changes apply to both standard analysis and Probe analysis. It is possible to have multiple Y scales for a single graph, and the ranges on these Y scales and on the X scale may be manually changed after the waveform is plotted. You may transfer waveforms from one plot group to another, or simply have the waveform not displayed in case it interferes with another waveform. Finally, it is possible to change the thickness of the waveform in order to improve its visibility on printouts or on the monitor.


There have been a few new parts added into Micro-Cap 5 to help with digital analysis. These parts act in conjunction with our new animate options. The animate options tell the simulator to produce one data point each time a key is pressed or when a specified length of time has elapsed. The new parts added are a seven-segment display, a digital LED, and a digital switch. These parts change their display or respond to clicks during a simulation. The digital switch lets you toggle an input between 0 or 1 during the simulation while the seven-segment and the LED produce displays on the schematic that indicate what state is present. The seven-segment and LED are for display purposes only. They will have no effect on the simulation.

Improved Component Selection

There are two new ways to select components in Micro-Cap 5 besides the Component menu and the Component palettes. At the bottom of the Component menu will appear the last ten components that have been used. This lets you have quick access to the most recently used components. There is also a Find Component command now. This command lets you locate a part by its name. For example, if you specify 2N as the search attribute, then this command will return all parts that begin with 2N to choose from. If you specify 2N2222, then that part will immediately be available for placement in the schematic.

Frequency Dependent Elements

Micro-Cap 5 has added the capability for some components to vary with frequency during an AC analysis. The resistor, capacitor, inductor, and nonlinear function sources all have an additional attribute called FREQ. This attribute may accept any equation that uses f (frequency) as a variable. When running AC analysis, the component will use the frequency that is specified in the frequency range text field in the AC Analysis Limits dialog box. This feature enables you to easily simulate circuit characteristics such as skin effect.

.Define Macros

Another feature is the ability to create mathematical macros using .define statements. These macros may be used as expressions in an analysis or in defining a component. For example, the following line:

.define PB(Q) IC(Q)*VCE(Q)+IB(Q)*VBE(Q)

describes an equation for the power dissipation in a BJT. In transient analysis, you may choose to plot the waveform PB(Q2) which would then plot the power dissipation through the transistor Q2. These macros can be local if placed in the text area or global if placed in the User Definition page.


Besides the existing expressions, there are quite a few new expressions in Micro-Cap 5. Among these new expressions are the hyperbolic functions - cosh(x), sinh(x), and tanh(x), a table function - table(x), a step and impulse function - stp(x) and impulse(x), integration and derivation operators - sdt(u) and ddt(u), and relational operators - min(x,y), max(x,y), limit(b,x,y), and if(b,x,y).

Monte Carlo Analysis

Monte Carlo analysis has a few new improvements. First of all, it uses the performance functions which measure rise time, fall time, pulse width, period, and more. It is also possible to define a boolean equation that sets a limit on the Monte Carlo analysis. Any of the Monte Carlo runs that violate this limit are saved to the text output file. This file may then be loaded into Micro-Cap 5, and Micro-Cap 5 will recreate the circuit that caused the failure. Finally, it is possible to create multiple histograms after the run.

Schematic Editor

Quite a few features have been added to the schematic editor. The same text name on different nodes now connects the nodes, simplifying schematic connections. It is now possible to edit the model statement for a component from the Attribute dialog box. When browsing through the Open File dialog box, the selected schematic is displayed in the background window. There is now an option to invoke Rubberbanding. This feature lets you move parts in the schematic while maintaining the same connections. The color palette has been increased from 16 to 64 colors for both the schematic and the analysis plot.


Besides the features mentioned earlier in the article, we have added Gear integration in addition to the current Trapezoidal integration. This is an option that may be chosen in the Global Settings. There is a pop-up list available in the Analysis Limits dialog box that lets you access available variables and functions easily. A new data point reduction algorithm has been added. For example, you may save every third data point calculated. For simulations with many data points, this will speed up both redrawing and printing. AC analysis has a new feature in which it may read from a state variables file instead of calculating an operating point. For circuits that have trouble converging in AC, you can run transient analysis until it hits its steady state, and then use that point to begin the AC analysis. A Print Preview has been added to the analysis. This preview lets you scale and print copies of the analysis, histograms, performance plots, 3D plots, and the schematic. Any combination of these may be printed on the same page.

Graphical Capability

Micro-Cap 5 has improved export abilities to other programs. You can select only part of a circuit with the select box, and then copy that portion into the Windows clipboard in BMP format. Micro-Cap 5 also lets you create Windows Metafiles of the entire window, circuit or analysis. The Metafiles may be saved in a file or sent to the clipboard where they may be pasted into programs such as Microsoft Word or Adobe Pagemaker. Windows Metafiles may also be imported into the schematic editor. This lets you place graphics such as company logos on your schematic.
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