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Questions tagged [integrator]

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2answers
125 views

The Art of Electronics (Integrators)

Reading this topic from "The Art of Electronics" : Integrators How does RC keep V << Vin?
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2answers
174 views

DC input on op amp integrator

I am trying to integrate a DC tension with a classic op amp integrator. The problem is : when I simulate my circuit on LT Spice, the output will always be equal to the VEE tension of the op amp ...
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0answers
34 views

RC integrator+ BJT emitter follower

i am designing a circuit able to draw IV curves of LEDS and diodes through Arduino. Basically i use the PWM function and an RC integrator to have an approximately constant voltage. Then i would ...
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1answer
55 views

Adjusting duty cycle without affecting frequency of a VCO

I've looked around the internet for a simple voltage controlled oscillator that is able to produce various waveforms in phase with one another. I asked about it in this site and was directed to a dual ...
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5answers
2k views

How does an op amp integrator work?

I know there are at least two questions related to this on stackoverflow but neither really answer my question, and in any case, both questions got downvoted. What I am after is an operational ...
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1answer
84 views

Op Amp integrator - limiting +Vsat to zero (ground)

Part of the Dual Slope ADC consists of an integrator which integrates the input voltage according to Vin/-Vref . I am using TL071 connected as an inverting integrator. Quick summary of operation: ...
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1answer
35 views

RC Integrator mean value

i am trying to understand the behaviour of an RC integrator for \$f>>1/RC\$, i.e. in the integration domain. I know that at the capacitor i have \$V = \int V_{in}/RC dt\$; experimentally i find ...
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1answer
66 views

How do integrator circuits serve as memory devices in continuous time system?

I didn't understand the yellow-marked sentence clearly, and even I did, what does it have to do with the conclusion that follows it? (marked in green). Thanks in advance.. Source: Modern control ...
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2answers
70 views

Can Op-Amp (LM358) works as an integrator without dual mode power supply?

I am a noob with analog electronics, so pardon me for any mistakes. I recently started with Op-Amp and currently working on a project whereI am using Op-Amp in integrator mode to convert square wave ...
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1answer
139 views

I need help sing a 555, op-amp integrator, and comparator to generate a voltage controlled PWM signal

I have LM358p op-amps Datasheet I'm trying to base my design off this: retrieved from here. My control voltage will vary between 0 and 3.5v. I want the output pulses to vary between 2.5 and 0.5ms ...
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2answers
63 views

Why doesn't my operational integrator work?

Here is the schematic I'm following, to build an operational integrator. (Image source - Electronics Tutorials) I'm using a LM358N IC which has 2 op amps. Below is a crude drawing of my connections. ...
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1answer
68 views

Control Theory Integrator Phase Shift

Guess I should know the answer, but I can't come up with a good explanation. I always have to remember which sign cos and sin have after integration/differentiation. I usually do this by thinking of ...
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1answer
78 views

effect non- inverting resistor in the integrator op amp

While looking into integrator op-amp circuits, I came across two different implementation. In one the non-inverting terminal is grounded . While in the other there is a resistor in between. Can ...
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1answer
66 views

Integrator circuit time interval

I am designing an Alpha particle time of flight detector which consists of two scintillators separated by 5cm of vacuum (few Torrs). The two scintillators are connected to two separate avalanche ...
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1answer
71 views

Do switched capacitor integrators have lower drift?

Im interested on getting long analog integration times, the continuous-time integrator drifts due to DC offset errors such as voltage offset, bias current and offset current, limiting its useful ...
2
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1answer
102 views

RC-circuit with one input terminal and many outputs with different integration time

What is the simplest way to create an RC-integrator with one input terminal and several output terminals which differ their times of integration (see schematics below). simulate this circuit –...
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2answers
68 views

Obtaining noise spectral density of OP-AMP from Peak to Peak voltage

I'm in need of a low offset opamp for integrating purposes, I also need it to be very low noise since the output of the opamp will go into a 3000 V/V gain stage. The opamp that seems to satisfy my ...
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1answer
82 views

Op. amp. with integrator - enough values to start?

All the red-circled values (Uref, C2, R31 and R36) are missing. I'm supposed to calculate them, but I think there's at least one value missing. Shouldn't Uref be known to calculate the rest of the ...
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3answers
142 views

Area under curve within a particular time window

I am trying to make an analog circuit which would measure the area under the curve of a periodic signal within a certain time window (say, t2 and t3 in the image). I expect different voltages(say 50-...
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0answers
40 views

Scaling of magnetic field strength and flux density measurements and shape of hysteresis loop

Note: this is part of a larger question which I was asked to separate into subquestions. Other subquestions: 1 and 2 I'm using the method outlined here to measure the induced magnetic flux density in ...
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0answers
39 views

Cutoff frequency of passive RC integrator used to measure magnetic flux density

Note: this is part of a larger question which I was asked to separate into subquestions. Other subquestions: 1 and 2 I am using a passive RC integrator to measure the induced magnetic flux density in ...
1
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1answer
54 views

Buffering the input to a passive RC integrator used to measure magnetic flux density

Note: this is part of a larger question which I was asked to separate into subquestions. Other subquestions: 1 and 2 I'm using the method outlined here to measure the induced magnetic flux density in ...
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2answers
657 views

How to make a constant current sink in the pA-nA range

I am tasked with making a constant current SINK for a testing device. It must outputs 4 separate values, -10pA -100pA -1nA -10nA. I need the current to last for at least 10-20 seconds, preferably up ...
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2answers
145 views

VCO from a rectangular and triangular signal generator

I need to create the simplest rectangular and triangular signal VCO I can using op amps. The output frequency should be changeable between 1k and 15k. I should also be able to change the amplitude of ...
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1answer
59 views

I need a circuit for a linear integrator using a capacitance multiplier

There are various circuit topologies for capacitance multipliers using op-amps. I need to implement a linear integrator where it would be advantageous to reduce the size of the integrating capacitor ...
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2answers
377 views

LF356 integrator simulation using LTspice

I used the LTpsice to simulate the feedback performance of a integrator circuit with op amp LF356 which is a JFET input op amp but I go strange results (see the image below). The model of the LF356 ...
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2answers
68 views

Operational Amplifier Integator

I want to design op amp integrator circuit with variable time constant using a simple switch. What is the typical shunt capacitance of a switch? I assume Ron of switch to be less than 5 Ohms. I want ...
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1answer
46 views

What is the frequency response of a charge mode amplifier?

I'm having some difficulty understanding the frequency response of a charge mode amplifier, circuit shown in Figure 1 below. ...
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0answers
66 views

Gated integrator IC, non continuous

Can anyone give me any suggestions for some good gated voltage integrators that aren't continuous, and more like a boxcar integrator? I want to integrate the the total voltage across a pulse coming ...
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1answer
132 views

Integrator DC drift

I have to integrate signals very precisely, and Im facing DC drift on inverting integrators using opamps. The usual cure is to add a resistor in parallel with the capacitor, however this produces a ...
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0answers
134 views

Saturation due to opamp offset

I have built a non inverting integrator with a THS4631 op-amp. The circuit schematic is shown below. Without any input the output of the circuit should saturate to supply voltage. However, the output ...
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3answers
599 views

Ideal integrator op-amp DC offset at output?

i have a question with this ideal op-amp integrator circuit where R=1k and C=1uF. Then i put a 50mV 100Hz square wave at the input and get the following response, which is what i expected and ...
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1answer
370 views

How does the compensating resistor act in op amp

Figure above is an integrator which has a compensating resistor Hi there and I have a question about the compensating resistor, which is connected to the positive input in above circuits. I know the '...
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2answers
1k views

Integrator as DC servo

I have used integrators in the feedback loop of standard inverting and noninverting amplifiers to eliminate DC off-set at the output, the circuit Im talking about is something like this simulate this ...
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1answer
223 views

Circuit analysis using an op-amp (non-ideal integrator)

I've the following circuit: simulate this circuit – Schematic created using CircuitLab My question is, is my method right to find the output voltage in relation to the input voltage? My Work: ...
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2answers
154 views

Implementing the I action in an analog PID controller

Can I implement the I action in an analog PID controller as follows?: simulate this circuit – Schematic created using CircuitLab And am I right when I say that the voltage follower is used to ...
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2answers
473 views

Vary the integration factor of a opamp integrator

I am working on a analog PID circuit and I need to make a opamp integrator circuit where I can change the integration factor. Now why do I've to make this circuit (I saw the circuit for example here): ...
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1answer
360 views

Op-Amp “Fast Integrator” Circuit

I'm trying to understand this circuit taken off of this application note. To get it out of the way, I'm familiar with the basic integrator circuit and its workings. What I'm having trouble with are ...
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1answer
1k views

Why is such amplifier configuration chosen for HB100 microwave sensor?

For HB100 microwave sensor module, I don't quite understand how this amplifier works and why it's been chosen instead of something simpler, such as two inverting or non-inverting op-amps. What can see ...
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2answers
179 views

RC integral and differential functions, Schmitt triggers. How does this circuit work?

I'd be happy if someone explained me why this circuit is the way it is; how does it work ? Also i would like to know what the value for C1 is. Taken from https://www.electroninvest.com/shop/items/...
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3answers
1k views

Obtaining a triangle wave from a square wave using a LM324N op-amp

I am generating a square wave with a 555 timer chip and I am trying to obtain a triangle wave from the 555's output by using an op-amp (LM324N) as an integrator. The op-amp is in single power supply ...
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1answer
913 views

Miller integrator

In the following problem I first drew the output waveform as a straight line with a negative slope starting at zero and constantly decreasing till it reaches -1V(section b in the question). I figured ...
0
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1answer
109 views

Two Miller integrator in series

How may I deduce the time constants from these output waveforms? For \$V_{o1}\$ may I write \$\tau=1/2\pi f\$, where \$f=1/T=1/1ms=1KHz\$?
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1answer
652 views

How to reset an integrator ONLY with RLC and op-amps?

I am trying to reset an integration circuit that is designed like above -- but obviously with another resistor attached to the op-amp positive input side as well. I have used 4.7k\$\Omega\$ resistors ...
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1answer
109 views

Miller integrator dc offset ->why no gradual increase towards saturation?

I made a miller integrator with a dc offset. (The initial condition of the capacitor is set to zero so initial condition is not the problem). There is a capacitor or 10-7 F capacitance and a source ...
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1answer
1k views

dc offset in a miller integrator

I simulated a miller integrator circuit on multisim online. When I did so I made sure that dc offset in the op amp and the source is zero and also bias and offset currents are zero. But in output to a ...
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1answer
460 views

Input Bias Compensation for a Comparator

I've been working on designing a discrete dual-slope ADC for school, and I've run into a problem. The schematic below shows my proposed input stage, an ideal integrator connected to a comparator. I've ...
0
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1answer
263 views

Integrator Design for Small Input Signal

I am designing an integrator circuit using op-amp. The circuit works very well for inputs greater than 7mVACRMS from 10Hz to 2KHz (error is inside 1%). The issue I am having now is when the AC input ...
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3answers
2k views

Is it possible to make an op amp integrator that integrates a DC input?

If the integral of a DC input is a ramp, can you make an op-amp circuit that integrates a DC input into a ramp, and then displays the ramp on an oscilloscope?
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1answer
458 views

Non inverting integrator with reference

This circuit should work as part of DC servo circuit in audio amplifier with single power supply, maintaining power amplifier stage working point at Vcc/2 (output is AC coupled). Intuitive approach ...