Questions tagged [multisim]
A SPICE simulation and schematic capture package distributed by National Instruments.
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Simulation isn't working for high voltage amplifier
Been trying to simulate on multisim a circuit I saw about high voltage amplifier:
Schematic source seems to be:
EDN Design Ideas, 2004 - page 123 of 155 (displayed page number 110)
High-voltage ...
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Implementing a counter using multisim
There was an assignment as follows: implement a counter which gets as an input of 8 pulses, 5 volts each, with frequency of 40K Hz, without using counter block, or any IC components. In the output ...
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Exponential circuit in Multisim
I have a circuit which has an exponential function as shown in the figure. I tried to put an anti-log op-amp with the diode and BJT transistor, but did not get what I wanted.
I think the whole ...
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Multisim is not giving any voltage value for this simple capacitor circuit
This is the circuit:
Even though I gave 12V it is showing 6V. Maybe it is peak voltage.
Why are the voltages across each capacitor so weird?
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AVCC source usage
I want to understand how the Arbitrary Voltage Controlled Current source (AVCCS) works. In Proteus, when I tried to simulate my circuit, it has some kind of a A,B formula for the source. But when I ...
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I used Multisim to simulate a circuit with an LM358 but it doesn't work. What is the problem?
The input is 1V. The output should be 1V*(1+R2/R1)=2V but the output in Multisim is 742.09mV. What is wrong?
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Why is there current through this MOSFET?
This is an N-type enhancement MOSFET, and from what I understand, there should be no source - drain current flowing when there is no voltage applied to the gate.
Why is there current flowing in this ...
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Multisim, Simulation Error
As the picture describes, the Vout is the division's result, but we have an error. Because my experience with MultiSim is not at a high level, why does this happen? Is this my fault ?
]1
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How can I use the component CD4538 or a 555 timer on Multisim?
How can I use the component CD4538 or a 555 timer on Multisim for a delay of 1 second ? I want both of the nor gates to be 1 for roughly 1 second when the output of the op-amps is either 01 or 10.
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How to transition multiple down counters using 74ls193 in a 'one at a time' sequence
I've been messing with this circuit but I'm struggling to find the solution I'm looking for.
I'm trying to create a sequence of down counters, so that when the first completes the next starts and so ...
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How can I measure phase shift in Multisim using a Tektronix oscilloscope?
I have to measure the phase shift between input and output of amplifiers.
Below is an example circuit with voltage charts (yellow is input, blue is output.)
How do I measure phase shift between them?
...
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FM transmitter not giving the intended output of 88MHz to 108MHz
I am trying to build an FM transmitter that outputs 88MHz to 108MHz range using Multisim, but the circuit I constructed gives a lower voltage and lower frequency at the output according to the ...
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How can I apply this Vs(t) = 5cos(2000t) into the multisim circuit?
I found the rms = 3.53
it has 2000t whereas omega,w = 2000
so how can I use it to the AC source
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Multism11 differential amplification circuit
When I tried to draw a differential amplification circuit based on a sample picture and connected it to an oscilloscope, I'm getting a flatline on Channel A with a value of 0. What could be the ...
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SIMetrix simulation
Determine the true power dissipated in the load of a single-phase half-wave rectifier
fed from a 220 V 50 Hz supply. The load resistor is 37 ohm.
I'm getting an error during simulation on simetrix:-***...
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Abnormal THD values for Audio Amp in any circumstances
Using Charles Wenzel's "High Gain and Fidelity Audio Amplifier" (source:https://www.radiolocman.com/shem/schematics.html?di=335167) as my final project for my freshman year due this Saturday,...
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Multisim Multimeter showing blank reading (--------)
I am trying to build a simple circuit to back up some hand calculations that I am completing for a project. However I am unable to get a reading on the Multisim multimeter. I have changed the ...
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Designing an ADC circuit incorporated into an 8-bit SAR that can convert an analog signal (such as sound from an electret microphone)
My task is to design a ADC incorporated into a system that converts an analog signal such as a sound picked up by a microphone into a digital signal.
I have chosen an electret microphone. I know the ...
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How can I find the time period for two sine waves using the oscilloscope in Multisim?
The formula for calculating the phase difference requires a time delay and a time period which is given in the formula:
Φ = td/tp × 360
Where ...
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Why does my THD-value not converge in simulation of rectifier circuit?
I'm trying to simulate a FWR - circuit with an RC-load. In doing so, I want to analyze the THD-value of the circuit.
In the end, I've tried changing the FFT-points, increasing and decreasing the ...
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Why are the absolute output voltages of the two NOR different in my self-built 555 timer?
I tried to build a 555 timer using the Multisim live online (free version).
I refer to the Ben Eater's video which I believe referred to the 555 timer datasheet.
Here is my circuit and the simulation ...
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How do phototransistor and photodiode work in multisim ? How can one cause the photodiode to trigger the phototransistor?
I would like to design this circuit shown in the picture. I have simulated it in Multisim. It functions as follows: When the switch is open, the phototransistor is high impedance, when the switch is ...
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How to use phototransistor in Multisim?
I've multisim 14.2.
I not succeeded in make a phototransistor or photodiode to work.
I've tried a circuit like this
But no way to work.
Any clues? I don't know how to do it.
Thanks a lot.
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Multisim Component Separation
This is how I created a circuit. How can I remove the R1 resistor from this circuit without breaking the wires as follows. Shortcut or otherwise.
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Is there somewhere accurate SPICE model for Analog Devices AD5246 I2C adjustable resistor?
Question already in title - is there?
Because I haven't seen official model on Analog.com.
Because I asked AI to create such model for me, and it spit this:
Sure, here's a SPICE model for the AD5246 ...
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Multisim simulation of a current division
I'm currently trying to simulate a current division for three transmission lines that are in parallell (but all of different lengths). I want to study how the current divide itself as we progressively ...
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Why is the voltage in the resistor different from what is recorded in the oscilloscope and multimeter?
I made a halfwave rectifier circuit in Multisim.
How is it possible that the voltage on the resistor is Vrms (Resistor) = 10.562V while on the oscilloscope the Vpeak = 33.264V?
Isn't the Vpeak on the ...
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Inverting op-amp unexpected voltage shift
I'm trying to create an op-amp circuit that attenuates a 5 V input signal down to a 1 VRMS Vout signal (1.414 V Vout).
I need to shift the output signal by 2.5 V so that it can be fed into a unipolar ...
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Digital Counter not initializing to 0 or rolling over to 0
I'm trying to make a 3-bit counter using D flip flops that loops through the sequence (0,3,4,5,7) repeatedly.
So far, I've made a timing trace, block diagram, operation table, Karnaugh maps, rough ...
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Modelling an open-drain inverter in MultiSim
I want to model the SN74LVC1G06 (it's an open-drain inverter) in MultiSim, specifically the rise and fall time specifications.
The existing inverter model in Multisim just has rising and falling ...
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Input current on linear power supply
I am working on a new project, and I need to build a big PCB with a lot of circuits integrated. Therefore, I need to make a power supply on the PCB.
Since I am not comfortable with SMPS design, I ...
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Why is this happening using Multisim?
I'm using the website https://www.multisim.com/create/
Why does Multisim show the current as negative above the Zener diode?
Both probes are going the same way, yet the current is shown as a negative -...
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Gain loss in two-stage direct-coupled amplifier
I am designing a direct-coupled two-stage amplifier with the following design constraints.
VCE swings of both BJTs should be the same
2nd stage current (IC2) should be between 10 or 20 times the 1st ...
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Why does this high pass filter behave like a band-pass filter on Multisim AC Sweep simulations?
I have this high-pass filter schematic and its AC Sweep simulation. Until the break through the end, the graph is right, but I can't see why the graph breaks on the right hand side and the filter ...
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Version control with MultiSim
I am a beginner with analog electrical circuits. Similar to computer programming and CAD, is it recommended to use version control software when working with MultiSim? Are there circuits complicated ...
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Liquid level control using AD620
I am making a liquid level control circuit as follows:
I want to replace AD624 with AD620 is there any way to do so?
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Using potentiometer to light three different LEDs (Multisim)
I want to make a circuit that connects a potentiometer to three different LEDs (green, blue, red.) This circuit would simulate the wind speed sensor. If the potentiometer is high (V is high, ...
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Low voltage to drive LED flash (not successful in simulation, but works on breadboard)
I first did this circuit on a breadboard, except I originally used a light-sensitive resistor, which is around 1 kΩ at daytime and above 160 kΩ in darkness.
It oscillates with LED as capacitor adds up ...
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Input/output impedance of devices in a circuit simulator
I have to use a circuit simulator (I'm using Proteus, but can also use Multisim if necessary), to construct and analyse a passive RC filter. The general circuit is shown below:
I need to connect ...
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Flat positive sinus when simulating on Multisim
I am a biomedical engineering student and I have a recurring problem on Multisim.
When I try to redo my LTspice circuit I end up with a flat positive sinus. I tried changing the values to see if there ...
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Combine two circuits in Multisim
I have two circuits, two separate simulations in Multisim, which work fine until I try to combine them.
I tried a common ground, on-page connectors, added the voltage follower, but that didn't help.
...
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How come the Thevenin Equation is not being satisfied in this simulation?
i1 = 1A
R1 = 100 Ohm
R2 = 100 Ohm
R3 = 2200 Ohm
R4 = 220 Ohm
R3 and R4 are in parallel.
The first circuit shows that I open circuited at the end to calculate the Voltage across the open circuit ...
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LED works but speaker does not work in multivibration circuit
This circuit oscillates with LED (in multisim 14).
This circuit does not oscillate with speaker (labview, in real breadboard it only beeps twice and becomes silent, playback time 10 s, sample ...
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Multisim 14.2 issue
Using Multisim 14.2 to simulate a capacitor's charge cycle , I've noted that when the simulation starts for the first time, even if the SPST switch is OFF, the capacitor starts fully charged. Any idea?...
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Multisim results not matching handwritten results
I was given a project with the following question:
I calculated the current going through inductor 2 in transformer 2 as 4 phase angle -30.
\$Vs = 1440 V RMS\$
\$V_1 = \frac{1}{3} * V_S = 480 V RMS\$
...
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Why is this circuit not triggered (astable multivibrator) although it can be triggered on a breadboard?
Why is this astable multivibrator circuit getting balanced in a flash and not oscillating? It works on a breadboard. It once worked fine in simulation, but one day it stopped oscillating in simulation....
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Why do I get a different value for DC output?
I am given the circuit shown below, a full wave rectifier with a filter.
To find the DC output on a full wave rectifier with a filter, I was given the formula:
$$V_{dc}(out) = \frac{V_{M}}{1+\frac{1}{...
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Summing RMS values proof [duplicate]
I have a simple circuit with two sources of different frequencies. I was tasked to get a voltage output across a component. I know for a fact that adding the derived voltage of both sources acting ...
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Error in transferring Multisim design to Ultiboard
I have this problem in Multisim 14, I'm trying to transfer my design in the Ultiboard but when I do, these red circles on the edge of the PCB layout keep appearing.
What could be causing this?
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Practical integrator using op-amp
I'm trying to simulate a practical integrator using NI Multisim 741 op-amp. But I dont quite understand a variation in my waveform.
I'm applying a 1 kHz, 5 V sinusoidal signal as input to the op-amp. ...
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