Digital Simulator

Digital Works 3.04 is a graphical design tool that enables you to construct digital logic circuits and to analyse their behaviour through real time simulation. Its intuitive, easy to use interface makes it the ideal choice for learning or teaching digital electronics. You can even prototype simple digital electronic circuits before you actually build them.

You can download a free, fully functional evaluation copy of Digital Works for Windows 95, 98 and NT 4

Download Digital Works 3.04 - 1659 Kb

Micrometals RF Design Software

Micrometals FREE RF design software, RF-Toroid was written as a supplement to the Micrometals RF Application catalog. Much emphasis was put into calculating the location of the Self resonate frequencies for series and shunt inductors. RF-Toroid is for use DC to 300 MHz. Much research went in to the calculation and corrections from the standard formulas for low perm & phenolic cores to better predict the RF style of winding and application. Some features include SRF for series and shunt cores, peak Q curve ranges and 200 & 360 degree coverage to achieve the best product possible for the microwave designer who needs accurate and abundant information at the finger tips to compare one core to another simultaneously. The custom core feature allows for custom shaped cores, stacking cores side by side , ferrite cores and machining custom phenolic cores from plastic, wood, ect... Micrometals hope this tool will serve you well.

Download Micrometals RF Design Software - 397 Kb

Motorola Impedance Matching Program - FREE

Motorola's Impedance Matching Program is a specialized form of CAD specifically developed for RF power amplifier circuit design. It provides a simple environment for entering and analyzing impedance matching circuitry regularly employed in RF Power amplifier design.

Data sheets for RF devices contain large signal impedances (measured at a single combination of frequency, voltage, power level and power dissipation). These impedances must generally be transformed to another set of impedances (50 W or the input/output impedance of another device). To do this, MIMP provides a standard library of passive circuit elements; including various combinations of capacitors, inductors and transmission lines in both series and shunt configurations. It also contains a unique, DISTRIBUTED CAPACITANCE ELEMENT that models a capacitor distributed along a transmission line.

http://e-www.motorola.com/rf/designtds/mimp.html - 119K

LTspice/SwitcherCAD™ III

Fully functional Spice III simulator from Linear Technology

TLTC SwitcherCAD™ III is a fully functional Spice III simulator with enhancements and models for easing the simulation of switching regulators. This Spice is a high performance circuit simulator, integrated waveform viewer, which also includes schematic capture. Our enhancements to Spice have made simulating switching regulators extremely fast compared to normal Spice simulators.

Included in this download are Spice, Macro Models for 80% of Linear Technology's switching regulators and over 200 op amp models. Furthermore, resistors, transistors and MOSFET models are included as part of this package. With this Spice simulation, viewing of the waveforms of most switching regulators can be achieved in a few minutes on a high performance PC. Also, full circuits using op amps or transistors can easily be simulated.

Download LTspice/SwitcherCAD™ III:

LTspice/SwitcherCAD™ III 4 mB

CircuitMaker Student Version

This edition of CircuitMaker was created especially to provide students with access to one of the best resources available for learning electronics.

The CircuitMaker Student Version is the same as CircuitMaker Version 6, with the following limitations:

• Maximum of 50 devices per design (any type);
• Device library limited to 1,000 models;
• Symbol editor and Macro feature disabled;
• PCB netlist export limited to TraxMaker format;
• Technical support limited to fax and email only.

Download the CircuitMaker Student Version:

The CircuitMaker Student Version is available for download via http or ftp transfer