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CircuitLogix
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<h2 id="overview">Overview</h2> <p>Fast, accurate simulation of electronic circuits is essential because it provides the information needed to perform accurate analysis of circuit behavior. <a href="/facts/SPICE/mIMfxvm7">SPICE</a> simulators are used to verify that analog and mixed-signal circuits will yield the expected outputs. A schematic <a href="/facts/Netlist/Wwt4M3jo">netlist</a> file and circuit input values are fed to the SPICE software, which simulates the circuit's behavior for a specified length of time. CircuitLogix allows for the observation of voltage and current levels at any circuit node as they change with frequency and time. It allows for obtaining accurate results even when simulating complex circuits where hierarchical blocks are reused. The CircuitLogix simulation engine is based on Berkeley SPICE, and contains a <a href="/facts/GUI/wBlQFWDP">GUI</a> to make circuit design easier and more efficient. </p><p>The CircuitLogix <a href="/facts/32-bit/TDMVce8s">32-bit</a> SPICE engine is interactive, allowing, for example, the <a href="/facts/Frequency/QUSbPaW8">frequency</a> of sources to be changed, <a href="/facts/Potentiometer/UtTC1Nvj">potentiometers</a> adjusted, and <a href="/facts/Switches/vqbNDgYm">switches</a> thrown during simulation. The SPICE engine is fully integrated with the schematic capture and <a href="/facts/Waveform/yAskMREw">waveform</a> tools; CircuitLogix passes schematic edits to the simulator automatically while running. Components such as <a href="/facts/Fuse_(electrical)/xN78ylMS">fuses</a>, <a href="/facts/LED/gE8x4MDb">LEDs</a> and controlled switches are automatically updated in the schematic as the simulation runs. </p><p>CircuitLogix simulates <a href="/facts/Analog_signal/xDbb4uB5">analog</a>, <a href="/facts/Digital_data/JChckAvr">digital</a>, and mixed analog-digital circuits. The simulator first divides the circuit into analog and digital portions. 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 CircuitLogix digital engine was developed directly in <a href="/facts/.NET_Framework/J6QDAUhP">.NET</a>, faster than SPICE <a href="/facts/Macro_(computer_science)/7abAsm1o">macros</a>. Because the simulator automatically performs signal conversion, it is possible to connect any analog or digital part to any other. The system’s model library contains hybrid parts for analog-to-digital and digital-to-analog conversion. </p> <h2 id="mixed-mode-simulation">Mixed-mode simulation</h2> <p>CircuitLogix is a mixed-mode <a href="/facts/Schematic_editor/2DTwFXAt">schematic editor</a>, and includes both analog and event-driven simulation capabilities: any simulation may contain components that are analog, event driven (digital or sampled-data), or a combination of both. An entire mixed <a href="/facts/Signal_analysis/Npaja6zb">signal analysis</a> can be driven from one integrated schematic. All the digital models in CircuitLogix provide accurate specification of propagation time and rise/fall time delays. </p><p>The event-driven <a href="/facts/Algorithm/fnl5NmRt">algorithm</a> used by CircuitLogix is general-purpose and supports non-digital types of data. For example, elements can use real or <a href="/facts/Integer/PUwwrawx">integer</a> values to simulate DSP functions or sampled data filters. Because the event-driven algorithm is faster than the standard SPICE matrix, simulation time is greatly reduced for circuits that use event-driven models in place of analog models. </p><p>Mixed-mode simulation is handled on three levels by CircuitLogix: (a) with primitive digital elements that use timing models and a built-in 12-state digital logic simulator, (b) with subcircuit models that use the actual transistor <a href="/facts/Topology/2EqW47cU">topology</a> of the <a href="/facts/Integrated_circuit/fjn6vg7C">integrated circuit</a>, and finally, (c) with In-line <a href="/facts/Boolean_logic/VkCToAmg">Boolean logic</a> expressions. These two modeling techniques use SPICE to solve a problem while the third method, digital primitives, uses mixed-mode capability. </p> <h2 id="component-library">Component library</h2> <p>The component library includes: </p> Digital primitives Gates, <a href="/facts/DeMorgan/6fQ1KTPb">DeMorgan</a> symboled gates, buffers, inverters, flip-flops <a href="/facts/Semiconductor_device/6W3ryr50">Semiconductors</a> Semiconductor Resistors & <a href="/facts/Capacitor/hyowqv7n">capacitors</a>, <a href="/facts/Diode/JyaoyGnk">diodes</a>, Schottky & <a href="/facts/Zener_diode/z9yKXRSC">Zener diodes</a>, <a href="/facts/Bridge_rectifier/jN3TqC6M">Bridge rectifiers</a>, <a href="/facts/Varactor/Kfd2nv5k">Varactor</a> <a href="/facts/Transistor/Bmr8zwL0">Transistors</a>, <a href="/facts/FET/TerYC6Nz">FETs</a> <a href="/facts/BJT/9BMcGv5Q">BJT</a>, <a href="/facts/IGBT/XRafcaFE">IGBT</a>, <a href="/facts/UJT/c93v7y7e">UJT</a>, PUT, <a href="/facts/MESFET/pb05gUne">MESFET</a>, <a href="/facts/MOSFET/eTDJT2Km">MOSFET</a>, <a href="/facts/Darlington_transistor/2QGqjsgP">Darlington transistor</a> <a href="/facts/Display_device/yX1Mypk0">Displays</a>, indicators, <a href="/facts/Switch/vqbNDgYm">switches</a> <a href="/facts/Light-emitting_diode/gE8x4MDb">LEDs</a>, 7-Segment LEDs, Hex display, Hex key, Logic display, <a href="/facts/Normally_closed/vqbNDgYm">NC</a> <a href="/facts/Push-button/ezRenR1v">push-button</a>, <a href="/facts/Normally_open/vqbNDgYm">NO</a> push button, SPDT PB, Piezo buzzer, Pulser, Latch coil, Polar latch, Rocket, SCOPE, Stepper, Stoplight, Window Integrated Circuits Digital ICs 1K RAM, 32x8 PROM, complete selection of 40xx, 41xx, 45xx, 47xx, 74xxx IC's Linear ICs <a href="/facts/Op_amp/hunKdYb9">Op amps</a>, <a href="/facts/Comparator/jfk32rf6">Comparators</a>, Timers, Buffers, CDAs, <a href="/facts/Modulator/aAXPjINv">Modulators</a>, <a href="/facts/Analog-to-digital_converter/8YYNsMFg">A/D converters</a> & <a href="/facts/Digital-to-analog_converter/5loEvAeb">D/A converters</a>, <a href="/facts/Phase-locked_loop/sgmca8aQ">PLL</a>, <a href="/facts/Voltage-controlled_oscillator/85sdYF0m">VCO</a> <a href="/facts/Relay/NQcb9usW">Relays</a> <a href="/facts/Control_relay/NQcb9usW">Control relay</a>, SPST, DPDT, Individual contacts and coils (enable creation of any relay) Power supplies, Sources <a href="/facts/Battery_(electricity)/bqEpm4ue">Battery</a>, Voltage Terminal, <a href="/facts/Signal_generator/61VskyGA">Signal generator</a>, I Source, V Source, I->I Source, V->I Source, I->Switch, V->Switch, I->V Source, V->V Source Math devices A wide variety of devices for manipulating quantities Miscellaneous Devices Crystals, <a href="/facts/Fuse_(electrical)/xN78ylMS">Fuses</a>, <a href="/facts/Transformer/EYYfXWrF">Transformers</a>, <a href="/facts/DC_Motor/sUBwD8py">DC Motor</a>, F-V & V-F converters <a href="/facts/Transmission_line/cYlqaPo3">Transmission lines</a> Lossless, Lossy, and Uniform Distributed RC <a href="/facts/Vacuum_tube/VHd1BNLq">Vacuum tubes</a> 12AU7, 12AX7, 5879, 6L6GC, 6SN7, 7199P, 7199T Instruments <a href="/facts/Oscilloscope/HMdD8XVk">Oscilloscope</a>, Digital <a href="/facts/Multimeter/GBMtfIRu">Multimeter</a>, <a href="/facts/Bode_plotter/xcF1ej98">Bode plotter</a>, <a href="/facts/Curve_tracer/hfzswwLx">Curve tracer</a>, Data Sequencer, Signal generator, <a href="/facts/Logic_analyzer/uqjrQdUp">Logic analyzer</a>, <a href="/facts/Logic_probe/sgRoIm1d">Logic probe</a>, Logic Pulser Simulation Controls Initial Condition and Nodeset devices Miscellaneous <a href="/facts/Optoisolator/cTVnQkhN">Optoisolators</a>, <a href="/facts/Photodiode/152Rpk06">Photodiodes</a>, <a href="/facts/Voltage_regulator/RWQATaje">Voltage regulators</a>, References, SCRs, Triacs <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Comparison_of_EDA_Software/uCYS0eQY">Comparison of EDA Software</a></li></ul> <h2 id="external-links">External links</h2> <ul><li><a href="http://www.CircuitLogix.com">Official website</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Article regarding user base <a href="http://technews.tmcnet.com/news/2012/11/07/6706426.htm" target="_blank">http://technews.tmcnet.com/news/2012/11/07/6706426.htm</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>"ACCC document with article about the Electronics Technician distance Education program" (PDF). Archived from the original (PDF) on 2010-10-09. Retrieved 2007-04-26. <a href="https://web.archive.org/web/20101009071242/http://www.accc.ca/ftp/pubs/CollegeCanada/CollegeCanada-v3-2.pdf" target="_blank">https://web.archive.org/web/20101009071242/http://www.accc.ca/ftp/pubs/CollegeCanada/CollegeCanada-v3-2.pdf</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>"CircuitLogix Pro article". Archived from the original on 2015-11-17. Retrieved 2014-10-20. <a href="https://web.archive.org/web/20151117025148/http://source.theengineer.co.uk/software-and-communications/manufacturing-software/automation/circuitlogix-pro-combines-2d-and-3d-simulation/393604.article" target="_blank">https://web.archive.org/web/20151117025148/http://source.theengineer.co.uk/software-and-communications/manufacturing-software/automation/circuitlogix-pro-combines-2d-and-3d-simulation/393604.article</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>"3DLab reference". Archived from the original on 2018-11-12. Retrieved 2014-10-20. <a href="https://web.archive.org/web/20181112101358/http://www.adeptscience.co.uk/media-room/press_room/simulation-is-circuitlogix.html" target="_blank">https://web.archive.org/web/20181112101358/http://www.adeptscience.co.uk/media-room/press_room/simulation-is-circuitlogix.html</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> </ol>