Circuit Simulator [2021]
Yuk Walke
This is an electronic circuit simulator. When the applet starts up you will seean animated schematic of a simple LRC circuit. The greencolor indicates positive voltage. The gray color indicates ground. A red color indicates negative voltage. The moving yellow dots indicate current.
CircuitLab provides online, in-browser tools for schematic capture and circuit simulation. These tools allow students, hobbyists, and professional engineers to design and analyze analog and digital systems before ever building a prototype. Online schematic capture lets hobbyists easily share and discuss their designs, while online circuit simulation allows for quick design iteration and accelerated learning about electronics.
I'd like to dabble a bit with building a synth. I have some experience with building electronic circuits. However, I don't exactly enjoy fiddling with the actual components - I'm more interested in the logic and problem solving aspect of it.
So, is there a circuit simulator or something that would allow me to experiment with various designs and hear the results on the computer? That way I could first find a design I like and work out the kinks, and then build the physical thing once I'm happy with the virtual version.
I'm a bit new to simulating circuits and I'm looking for advice on the best way to simulate a load. I'm trying to build a current limiting circuit, using a current sense resistor and a set of transistors. The end application that I have will probably exceed the current limit of the transistors, so I'm trying to replace them with MOSFETs.
In the that circuit I use the VCR model in combination with a "comma-separated-values" voltage source to create a linearly rising voltage from 0V to 1V. This allows me to perform a time-domain simulation in which the effective resistance between VCR1A and VCR1B varies from 0Ω to 1kΩ. I place that resistance in the feedback path of an inverting amplifier, where it is effectively controlling the gain. Here's what the output looks like, when the input is a sinusoid:
There is no problem modeling a resistive load with a resistor. This circuit wil produce 45mA current limit to any load (R2). As long as you have the 5V signal on the input, the circuit will provide the current to load limited to 45mA. If the input voltage goes to 0V, the current will go to zero (ignoring any leakage currents). You should not need to go to a MOSFET at 45mA current but I used one in my illustration just so you can see how it behaves. Your original circuit runs at about 50mA with two 2N3904 transistors. Since the MOSFET that I used has a relatively high threshold voltage, the turn on characteristics are quite different.
TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages and waveforms. TINA's schematic capture is truly intuitive - a real "quickstart."
TINA-TI installation requires approximately 500MB. Installation is straight-forward and it can be uninstalled easily, if you wish. We bet that you won't.
Thanks for the reply. In my project am implementing thermoelectric model in fenics and I want to do surface coupling with the electronic component resistor to see the current available from the model.
To connect the fenics model with the complex circuits, i will have to couple the surface of my fenics model with the circuit simulators like Spice, LT spice.
Spectre is a SPICE-class circuit simulator owned and distributed by the software company Cadence Design Systems. It provides the basic SPICE analyses and component models. It also supports the Verilog-A modeling language. Spectre comes in enhanced versions that also support RF simulation (SpectreRF) and mixed-signal simulation (AMS Designer).
Spectre was developed at Cadence Design Systems by Ken Kundert and Jacob K. White. The software is continuously being improved upon and developed further to bring high quality, accurate analog simulation.Spectre is currently a leading circuit simulator, competing with HSPICE and several others.
PathWave HSD Circuit Simulation is the basic element that includes the transient / convolution simulator, channel simulation, via designer, and controlled impedance line designer (CILD). This element enables a cohesive workflow to quickly and accurately simulate for high-speed serial channels.
Aya Mouallem, EE PhD candidate, RAISE Fellow, and Knight-Hennessy Scholar is designing an electronic circuit simulator to allow blind and low-vision engineering students to collaborate with sighted colleagues.
Simulating the design of electronic circuits is a fundamental skill for electrical engineering students. Most simulators have the user drag and drop design components on a computer screen. But this can create barriers for students with blindness and low vision.
Working in the Designing Education Lab, Aya is designing an accessible electronic circuit simulator that uses a mix of haptic and digital components, with both tactile and audio feedback.
I was actually thinking of doing an article/video about circuit simulators, as there are a few around for the Arduino and ESP32. But I hadn't seen Crumb Simulator, it certainly is something I'll need to take a closer look at.
@darup It's a breadboard simulator. You don't need it, but some folks use it especially if they don't have all the parts or they are just curious about how a certain circuit works. If you are at all interested, download one (there are several besides this one) and play with it to see if it helps you.
A good simulator can be an educational or development tool. Having said that, I have yet to find a "good" one that isn't prohibitively expensive. This one is not it, at least it wasn't when I examined it a few months ago.
From an electric circuit simulator, I simulated my circuit in time domain and saved a signal in a .txt file (which contains both time and signal values).Based on that .txt file, I would like to produce a FFT to see the signal in the frequency domain.
The 300 is NOT the frequency, because the frequency of my electronic circuit is 100kHz. So I need to find a way to map the 300 in the graph to 100kHz to match my simulations. This is fairly easy if the sample rate was constant. But is it also possible if the sample rate in the .txt is non-uniform?
We now generalize the above to quantum circuits.Instead of bits, we have qubits.A qubit can be 0, 1, or a superposition of 0 and 1.So if you write out its vector, it can have numbers in different indices.E.g.,
With foundry-certified accuracy, AFS delivers nanometer SPICE accuracy > 5x faster than traditional SPICE and > 2x faster than parallel SPICE simulators. For large post-layout circuits, the new AFS eXTreme technology delivers over 100M-element capacity and >3x faster than post-layout simulators.
Classical simulation of quantum computation is vital for verifying quantum devices and assessing quantum algorithms. We present a new quantum circuit simulator developed on the Sunway TaihuLight supercomputer. Compared with other simulators, the present one is distinguished in two aspects. First, our simulator is more versatile. The simulator consists of three mutually independent parts to compute the full, partial and single amplitudes of a quantum state with different methods. It has the function of emulating the effect of noise and support more kinds of quantum operations. Second, our simulator is of high efficiency. The simulator is designed in a two-level parallel structure to be implemented efficiently on the distributed many-core Sunway TaihuLight supercomputer. Random quantum circuits can be simulated with 40, 75 and 200 qubits on the full, partial and single amplitude, respectively. As illustrative applications of the simulator, we present a quantum fast Poisson solver and an algorithm for quantum arithmetic of evaluating transcendental functions. Our simulator is expected to have broader applications in developing quantum algorithms in various fields.
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