![]() ![]() These components are technology-independent, which means that they have only nominal circuit delays and power dissipation, unrelated to any particular technology. The “Misc Digital” group has three families of components, of which family “TIL” contains models of generic logic gates, flip-flops, and modular functions. For designing and simulating digital logic circuits in this course, “Misc Digital” (TIL family only) is used. Each group comprises one or more “families”, within which the components are implemented with a common technology. The Multisim library is organized into “groups” of related components (Transistors, Diodes, Misc Digital, TTL, etc.). Each component is selected from the Multisim library and placed on the drawing sheet in the Circuit Window (also called the Workspace). Optionally, signal “sources” may be connected to the circuit inputs, and “indicators” to the circuit outputs. Draw a schematic diagram of the circuit Place Components A schematic diagram comprises one or more circuit components, interconnected by wires. Blank design with default name “Design 1.” In the dialog window, navigate to the directory in which the design is stored, select the file, and click the Open button. A previously saved design can be opened via File>Open. Save the file with the desired design name via menu bar File>Save As to use the standard Windows Save dialog. ![]() Open Multisim and create a design This creates a blank design called “Design1”, as illustrated in Figure 1. ![]() Run the simulation and examine the results, copying and pasting Multisim windows into lab reports and other documents as needed. Connect the circuit outputs to one or more indicators to display the response of the circuit to the test patterns. Design digital test patterns to be applied to the circuit inputs to stimulate the circuit and connect signal sources to the circuit inputs to produce these patterns. Draw a schematic diagram of the circuit (components and interconnections). The basic steps in modeling and analysis of a digital logic circuit are: 1. DIGITAL LOGIC CIRCUIT MODELING AND SIMULATION WITH MULTISIM Multisim is a schematic capture and simulation program for analog, digital and mixed analog/digital circuits, and is one component of the National Instruments “Circuit Design Suite”. ![]()
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