![]() Because the simulator automatically performs signal conversion, it is possible to connect any analog or digital part to any other. The CircuitLogix digital engine was developed directly in. The analog circuitry is simulated with the time-step driven SPICE engine, while the digital parts are simulated separately with an event-driven simulation engine. The simulator first divides the circuit into analog and digital portions. Components such as fuses, LEDs and controlled switches are automatically updated in the schematic as the simulation runs.ĬircuitLogix simulates analog, digital, and mixed analog-digital circuits. ![]() The SPICE engine is fully integrated with the schematic capture and waveform tools CircuitLogix passes schematic edits to the simulator automatically while running. The CircuitLogix 32-bit SPICE engine is interactive, allowing, for example, the frequency of sources to be changed, potentiometers adjusted, and switches thrown during simulation. The CircuitLogix simulation engine is based on Berkeley SPICE, and contains a GUI to make circuit design easier and more efficient. It allows for obtaining accurate results even when simulating complex circuits where hierarchical blocks are reused. CircuitLogix allows for the observation of voltage and current levels at any circuit node as they change with frequency and time. A schematic netlist file and circuit input values are fed to the SPICE software, which simulates the circuit's behavior for a specified length of time. ![]() SPICE simulators are used to verify that analog and mixed-signal circuits will yield the expected outputs. Overview įast, accurate simulation of electronic circuits is essential because it provides the information needed to perform accurate analysis of circuit behavior. 3DLab virtual components include batteries, switches, motors, lamps, resistors, inductors, capacitors and instruments including oscilloscopes, Signal generators, and frequency counters. It also includes 3DLab, which is a software product that combines an interactive 3-dimensional learning environment and electronic devices and tools to enhance the user's comprehension of electronics. The professional version of CircuitLogix (CircuitLogix Pro) includes over 10,000 device models, as well as 8 virtual instruments. The electronics program has won awards including the Award of Excellence from the Association of Canadian Community Colleges (ACCC). ![]() Colin Simpson, an electronics professor at George Brown College, in Toronto, Canada, and John (Bud) Skinner, a computer programmer. The logical rule OR is appropriate to decide if we need to have an umbrella with us if it is raining now, or if it is expected to rain later (or if it is raining now and is expected to rain later) then we need an umbrella.CircuitLogix was developed by Dr. For example, maybe our two inputs represent “Is it raining right now?” and “Is rain forecast for later?” and our output represents “Bring an umbrella”. The truth table below shows those four possibilities: Truth table for OR ¶Īlthough the computer will only think in terms of 1 and 0, those can stand for any piece of information that has a true/false or yes/no answer. In every situation but 00, the output is on (1). There are four possible sets of inputs for the two switches: 00 - both off, 10 - top on, 01 - bottom on, 11 - both on. A truth table shows each possible set of input and the output those inputs produces.įor the circuit shown above, we can think of the top switch as Input 1 and the bottom switch as Input 2. This can be summarized in terms of a truth table. The OR rule says that if either input (switch) is on, the output (light) is on. These switches are demonstrating the Boolean logic rule of OR. The term Boolean logic gets its name from him. George Boole invented the rules of logic that computers use in the 1800s. The only way the light bulb will not be on is if both switches are in the off position:
0 Comments
Leave a Reply. |