Spectrum Software
Industrial Strength Simulation




Spectrum Software has released Micro-Cap 11, the eleventh generation of our SPICE circuit simulator.

For users of previous Micro-Cap versions, check out the new features available in the latest version. For those of you who are new to Micro-Cap, take our features tour to see what Micro-Cap has to offer.




Easily Overlooked Features - Winter 2007


This section is designed to highlight one or two features per issue that may be overlooked because they are not made visually obvious with a toolbar button.

Protect Command
Micro-Cap has the capability to encrypt proprietary schematic or macro files which can be used to protect sensitive material. To encrypt a file, go to the File menu and choose the Protect command. The Password dialog box that appears below will be invoked. The file to be encrypted must be the active file when this command is selected.

Password dialog box

The dialog box contains two fields in which the user will enter the password that they wish to use to encrypt the file. Both entries must of course match each other. The dual entry method helps shield the user from making a typo when entering the password.

Once encrypted, the file can only be opened for viewing and editing if the password is supplied. Protected files can still be used as macros and simulated in other circuits without requiring a password. This provides a useful scheme where encrypted macros may be used by another user in one of their simulations. For the other user, the macro component in their schematic would just be a black box as they would not have the capability to view the internal macro circuitry without having the password.

To remove the protection, load the protected file and use the Save or Save As commands, which will save the file in standard text format without encryption. Since the normal Save commands decrypt the file, the typical method is to protect the circuit file when it reaches its final finished form. Otherwise, the Protect command will need to be used to save the file each time it is updated.

Return to the main Newsletter page