Literature: 		SPICE Newsletter
Description: 		Technical publication describing applications of the SPICE circuit simulation program
Price:	 			FREE
Featured Topics:	Simulating Nonlinear Magnetics, Simulating Switched Mode Power supplies, New Power Supply Designer's Model Library
Other Topics:		New Keyless Network version of SPICE
Contact:			Charles Hymowitz - Vice President intusoft   (310) 833-0710, Fax (310) 833-9658
					E-mail: 74774.2023@compuserve.com, Internet: ftp.iee.ufrgs.br


FREE SPICE Newsletter Discusses Power Electronics

	The Intusoft Newsletter is a unique FREE publication dedicated to discussing the SPICE circuit simulation program and its usage. The June 1995 issue contains information on simulating magnetics and switched mode power supply designs, as well as announcements on several new analog and mixed signal products.

	The first article discusses simulating nonlinear magnetics with IsSpice. Two models are offered; one based on SPICE 2G and a second that uses IsSpice analog behavioral extensions.  Example netlists of each magnetic core topology are provided along with an example Royer oscillator circuit.  Both models are much easier to use than those found in other SPICE programs. The popular Jiles-Atherton magnetics model, used in some SPICE programs, requires parameters that are not easy to find and are difficult to calculate.  In contrast, the Intusoft model accepts commonly available electrical or physical parameters available directly off manufacturer's data sheets.  The models accurately simulate nonlinear core behavior including saturation, hysteresis, and eddy current losses. 

	The newsletter also introduces a new IsSpice library for Power Supply Designer's. In addition to the core models the library contains switching level models of various PWM ICs. By way of example, the magnetic cores and the Unitrode UC1843 PWM IC are used in a forward converter to provide a realistic SMPS simulation.

	Another article introduces Intusoft's keyless network version of its popular ICAP/4 package.  Virtually all commercial SPICE programs require a hardware protection key (dongle). The new ICAP/4 version alleviates this nuisance. The software is licensed for a specific number of copies that "float" on your network.  Special metering software on the server alleviates the need for a key on the client stations. With this new product Intusoft becomes the only major CAE tool vendor selling a version of Berkeley SPICE 3 without a copy protection key.

	A floppy disk containing all of the schematics and SPICE models in the newsletter along with new 555 Timer models from SGS-Thomson, new Maxim op-amps and comparators, and new power MOSFET models from Siliconix are available for a nominal fee.

	The Intusoft Newsletter is the only regularly scheduled publication dedicated to SPICE modeling and analog circuit simulation. An electronic version (Replica document) of the Intusoft Newsletter is posted on CompuServe (CADD/CAM/CAE Vendor Forum) and the Internet (ftp.iee.ufrgs.br). The peak newsletter circulation is currently at 34,000 readers in over 110 countries.