Questions tagged [multisim]
A SPICE simulation and schematic capture package distributed by National Instruments.
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Designing a current sensing op-amp circuit for an AC load
I'm trying to simulate a current sensing op-amp circuit. My AC voltage, 24 VAC, is across a load of 10 Ω. I used a 100 μΩ resistor and measured the voltage across it using an op-amp.
Looking at some ...
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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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Time step Error In Multisim Using 555 timer
I am trying to simulate a circuit in multisim and I keep running into the following error. (new to multisim) I attached a picture of the circuit and error. Any advice on how to fix this?
The purpose ...
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How to shift the register while using SIPO shift register?
I have used this SIPO shift register and I've displayed the pattern that I wanted which is 01011000 but I don't know how to shift it now? How can I make the LEDs move?
I've been told to insert a load ...
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How do I add dielectric Breakdown Voltage of air in Multisim?
For my simulation, I need to add a component that represents air with dielectric breakdown voltage of 1 kV. How do I do that?
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Simulate the audio amplifier using the circuit shown
Okay so I've done the exact same thing in Multisim but I don't know how to find the voltage again. I tried to place the multimeter in the audio (where I have placed the multimeter) but the values vary ...
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Multisim Circuit with Virtual Crystal and TTL gates
I have to make the following circuit in Multisim:
This is what I have done:
As you can see, the output (in points ~Q and Q) is 0V and I can't figure out why. Could anybody help me?
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Multisim: How to generate a sweep frequency?
is there a way to generate a sweep of square wave frequency in multisim?
I'm trying to test a device but I'd need the speed to increase from 100hz to 1 khz
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How to Convert 16 bit to Decimal on Multisim?
I have created a Simple Calculator and I want to show the Output as Decimal Up to 65535. Output currently Showing as 1 0. Can anyone suggest me How can I do It Thanks
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Calculating output impedance of this op-amp
Let the following schematic from pages 9/10 of "link"
I'm tasked to calculate the output impedance so we used this circuit which is equivalent to the under picture model, with \$R_L = VR1 + ...
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High distortion problem with common source MOSFET amplifier
I am simulating this circuit, it is a MOSFET common-source amplifier biased using the drain-to-gate resistor configuration. MOSFET parameters are:
VTO = 1.25V, Lambda = 0.005, Kn = 0.065 (A/(V.V)), W/...
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Implementing Inverter op-amp, calculating impedances in multisim
Consider the following circuit , i have couple of confusions before asking the question, so suppose the source Vin has a frequency of 1kHz and amplitude of 50mV, and also we set the potentiometer to 0%...
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In Multisim, is the IC labeled "SR_FF" active-high or active-low?
I am analyzing the flip flop IC to understand how it works. Specifically, I am using the chip labeled SR_FF. I am told that a regular, 4 pin flip flop can either be "active-high" which ...
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Implementation of Op-Amp
I want to implement this circuit in multisim, i fail to do so, because first im not aware of the internals of this circuit, i dont understand whats the purpose of R14 and whats the purpose of VR1 and ...
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Output of op-amp in Multisim and CircuitLab
I have two identical circuits of op-amp one in MultiSim and one in CircuitLab. They show different current out of the op-amp and I am not sure why.
Here is the MultiSim circuit.
In case it is not ...
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How to improve gain for CC-CE-CC amplifier
I'm trying to design my first amplifier; my configuration is CC-CE-CC. My Vcc is 10V and Ic for 3 transistors are 0.5mA.
When i designed this, i wanted the overall gain to be 50 times, ( and around 90%...
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Multisim Christmas Lights with 4060BT not working
Hello I'm new to using multisim and I'm trying to recreate this circuit for christmas lights. It does blink as intended but it crashes after 5 seconds or so. Can anyone help a bit please or offer any ...
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Why do I get the wrong phase shift?
I am trying to compare theory vs simulation values and it seems to be that there are differences. I am using Multisim to simulate a RLC circuit, the LC are in parallel and in series to the resistor.
...
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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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Class-A power amplifier magnitude and phase
I just did a simulation in Multisim of a class-A power amplifier, but the phase graph of the AC sweep (AC analysis) is not what I expected.
With the reference circuit diagram, I simulated the circuit ...
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Adjusting Output Voltage of a DC-DC Boost Converter controlled by STM32 PWM
I'm building a boost converter from scratch and am planning to use an STM32 microcontroller to generate a PWM signal to regulate the output voltage. The power supply voltage of the circuit is 24 V, ...
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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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Multism simulation for NMOS type circuit, why I am not getting the expected graph?
I am trying to simulate my circuit for one of the question problems. The question looks like this
I have written a MATLAB script to see the expected graph
...
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Non-inverting amplifier weird Vout values
I am doing a simulation in multisim to simulate an non inverting amplifier, but i have gotten values that is not what intended. From what i know, the gain for non inverting amplifier is Va = 1 + Rf/...
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Simulation Error (MULTISIM)
I am trying to make a basic invertor circuit using MESFETS the following figure shows the actual circuit but when i connect in multisim software it shows simulation error can anyone help me how to fix ...
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Having a Counter issue on a PLD, programmed from NI MultiSim
In a PLD build:
I have built a counter that counts 0-9 combined to a second counter that counts to 8, to create a counter that counts up to 80. It has a reset and hold (@80) function as well. I have ...
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Why doesn't this 950 MHz to 2200 MHz Colpitts VCO circuit work in Multisim?
I found a 950 MHz to 2200 MHz Colpitts VCO circuit from this web page.
I tried to design it in Multisim, but doesn't produce any signals. Why?
I used BB130 diodes instead of SMV1232 because Multisim ...
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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?
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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 parallel (but all of different lengths). I want to study how the current divide itself as we progressively ...
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Amplifying op-amp thermocouple circuit
I am trying to simulate a thermocouple amplifying circuit for a project, and for some reason, my output keeps producing a square wave, rather than a sinusoidal wave.
I found this diagram online on a ...
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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 a 74LS193 in a 'one at a time' sequence
I'm trying to create a sequence of down counters, so that when the first completes, the next starts, and so on until the last one, then repeat.
I thought it would just be a case of adding a flip-flop ...
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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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Multisim component name - voltage level convertor
How do I find the circled components on Multisim?
This is a logic voltage level convertor circuit.
I'm unable to find it anywhere in Multisim search.
Could it be that in new versions they removed this ...
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MOC3043 on Multisim
I've been looking to simulate an optocoupler-triac driver for an AC Load in Multisim but I can't find a working model for a light emitting optocoupler specifically(the MOC-30XX family). I would really ...
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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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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 delta-delta connection
I try to simulate a delta-delta transformer connection in Multisim but I get an error, why, I don't know. My diagram is as below:
Here are the errors:
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Oscilllator model in multisim
What's wrong with this schematic? Multisim doesn't generate oscillation. Also I changed R3=1000, R3=500 but all the same.
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Multisim vs LTspice : Different Result
I was using the simple darlington circuit below as the test circuit.
DC operating point analysis was run on both LTspice and Multisim, with V2 as the manipulating variable and the base voltage of Q2 ...
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Simulating a 2nd order filter provides a 1st order response
I'm trying to design a filter with a bandwidth of 150Hz, center frequency of approx. 60Hz, with a roll-off of 40dB/decade. I am following the design of a 2nd order Multiple Feedback Band-Pass filter ...
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How do I derive the frequency of an LFO circuit?
I'm attempting to solve why the frequency of an LFO, which is a Schmitt Trigger - Integrator LFO, seems to be about 7.13 Hz even when the reverse logarithmic potentiometer is set to its lowest setting....
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Simulating noise signals in Multisim
I would like to simulate the effect of noise in a circuit built in Multisim so that I can make better component choices to improve my design. The main source of concern for me is that the circuit will ...
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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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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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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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