Questions tagged [integrator]

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2answers
93 views

Why feedback resistor be at least 10 times of the input resistance?

Figure below is an integrator with reduced output offset due to the 10R shunted at the capacitor. It was written on the book that: One way to reduce the effect of input offset voltage is to decrease ...
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2answers
51 views

Integrator with DC component

I have been puzzling my mind about this circuit for a few days and I have few questions. It seems like this -400mV does a lot of changes to a circuit. So here is a picture: Can anyone tell me why my ...
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3answers
72 views

Summing Integrator cut off

I would like to know how to calculate cut off frequency of this summing integrator circuit. I fail to find anywhere on the internet how to calculate cut off frequency in this configuration. Then how ...
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1answer
69 views

Using PWM to create DAC

It is my understanding that a square wave can be converted to a smooth analog signal via passive low pass filter. However, this low pass filter acts like an integrator which ideally achieves the same ...
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7answers
2k views

Op-Amp Integrator's virtual ground

I have been using op-amp TL072C in charge integrator configuration. R = 1k Ohms and C = 100 uF. Vin is a DC signal of 1 V. VCC = 10 V and VSS = -10 V. I get the expected output which is VSS, when a ...
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1answer
69 views

Is there a component that will OR the last 1-2ms of its input?

I need a component/circuit which will output 1 if a 1 has been input at any time in the last 1-2ms. I could make such a circuit out of several shift registers, an oscillator and several OR gates, or ...
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1answer
51 views

What happens when this integrator circuit reaches saturation?

I'm trying to understand integrator circuit timing, specifically at the point of op amp saturation. Here's my circuit: The op amp is dual supply +/-12V. Vin is a ...
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0answers
15 views

Offset on integrator circuit using opamp [duplicate]

So I am using this integrator circuit, and I noticed that the output sign with really low frequencies has no DC component. As I raise the input frequency i noticed that this DC appears with a negative ...
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2answers
88 views

DC component in an integrator circuit using opamp

While doing this project I ran into a problem. We are using an opamp in a integrator circuit. However we noticed the existence of a DC component that only apears when the input frequency is high. I ...
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5answers
4k views

Feedback resistor value in op amp integrator

Without the feedback resistor, \$\frac{v_{in}}{R}\$ current flows through the capacitor and charges it to \$v_{out}(t) = -\frac{1}{RC}\int\limits_0^tv_{in}\,dt \$ Good so far. My textbook says a ...
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1answer
69 views

Hold OPAMP Integrator at zero voltage (Guarantee defined slew rate)

I have the following request: I want to stop a common integrator (which should generate a defined slew rate for a square wave signal) exactly at zero (0 Volt) due to the return-to-zero coding of the ...
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1answer
51 views

Low pass filter vs integrator

Context: I am programming a flight controller for an autonomous drone. I want it to be able to hover in place so I am working on a PID controller for the throttle to keep vertical velocity at 0. (...
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1answer
92 views

Duty cycle detection circuit for square wave

I have two signals coming out of one block. One signal is one period delayed than the other one. Is there any method to detect the duty cycle of these pulses?. Edit: Clk is my original signal. Going ...
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2answers
184 views

Is this a Miller integrator?

When I googled Miller integrator the sixth picture that popped up is this one, but I'm not completely sure what circuit it is and if it is something similar to the simple "standard" op-amp Miller ...
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1answer
44 views

Effective Capacitive Loading of Active RC Integrator

For a simple active RC integrator shown above, what is the effective capacitive load when output is open-circuit. I think it would be the integrating capacitor, \$C_I\$, because of the virtual ...
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0answers
74 views

How do integrators affect encirclements in the Nyquist plot?

I am trying to write a program to determine the closed-loop stability of a system using a frequency response function for data-driven control. I count the number of clockwise(CW) or counter-clockwise(...
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1answer
85 views

How to use a Piezo ShockSensor and an op-amp practical integrator?

I have made this circuit : Once I apply a shock to the sensor, I get this result on the scope : CH1 (yellow) : piezoshock output CH2 (blue) : LTC6240 output Here is the spec of the piezo sensor : ...
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3answers
2k views

Why is inverting op-amp behaving like a low pass filter?

can anyone explain why this circuit behaves like a low pass filter despite having no capacitor in the feedback loop?
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2answers
69 views

How to integrate current signal to be able to measure it with 50 ohm input impedance of ADC

Preliminaries I am using a photomultiplier tube (PMT) in order to amplify scintillator's light signals. Some of the studied scintillators have long decay time and poor light yield. That makes these ...
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1answer
142 views

Is this Non-Inverting integrator correct?

I've seen time again the formula for an inverting integrator. I was wondering if I could swap the configurations on the inverting and non inverting inputs of the op amp to make the circuit a non-...
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1answer
141 views

Integrator with DC control gain

I am analyzing the integrator circuit and I can't get from which equation can I get the frequency where there is the intersection with x axis - 1/C*R1 ? Thanks! source
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3answers
148 views

Is there a simple way to discharge a bipolar capacitor using a 5V signal and a MOSFET/BJT?

I am using an op amp configured as an integrator, as shown in the schematic below. There is an input signal which can go both positive and negative [+1V ... -1V], and then depending on this input ...
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1answer
169 views

Understanding a dual op amp integrator circuit

I've come across this part of a circuit from a precision multi-slope ADC, it is described as a "Dual op amp integrator", but I am left confused as to what U11 accomplishes in this circuit, This part ...
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1answer
57 views

How to select resistance to cancel offset output voltage due to bias current?

Consider the figure above how Rcomp was choosen. I know for simpler circuits like inverting amplifier and ideal integrator how Rcomp was calculated but following same procedure (that's using ...
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1answer
375 views

How to calculate error amplifier output in amplifiers

I'm trying to derive an accurate formula for the output of an error amplifier in the class D amplifier I'm simulating. Most literature on the error amplifier/integrator in class D amplifiers glosses ...
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1answer
149 views

Op amp circuit with two capacitors

Based on an electronics lecture, we are dealing now with the preamplifier circuit for a detector. The figure is shown below. Actual I am having the problem to understand the center operational ...
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1answer
235 views

Transfer function of a summing integrator

I'm trying to derive the transfer function of a summing integrator for use in a feedback circuit. The single input and double input integrators are shown below. An integrator with one input is ...
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1answer
72 views

Why is the gain of an integrator built using op-amp -Rf/R1 till cut-off frequency

As you can see the gain is constant for the practical op-amp, even though gain is This shows that it clearly changes for every frequency. Is the one in the graph an approximation, maybe because it ...
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2answers
326 views

Calculate right leg drive integrator

My question intersects with "What does this op-amp circuit do? (part of an ECG)", but I need some more detailed clarification on the opamp integrator of this right leg drive circuit as found in the ...
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3answers
191 views

Difference between two integrator circuits

What is the difference between the two integrator circuits? They are used in an amplifier with feedback. There's heaps of information online about the one on the right but not so much about the one on ...
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3answers
280 views

Sine Wave Input for Op Amp Integrator but Output Looks Weird

The input is in sine form (AC input) but the output (in blue color) is the straight line. So what is wrong with my schematic in LT Spice this time? I thought I should've got output in sine form if I ...
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3answers
672 views

How to produce sawtooth waveform from square waveform?

I have a question pertaining the changing of square waveform to sawtooth waveform using OpAmp. Following the picture below, I have to create a sawtooth waveform from a square waveform. It seems that ...
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1answer
213 views

RC Frequency to Voltage Converter

I'm an electronics engineering student and I want to state that this question is not my homework, it is a tiny part of my project (PWM encoder) but I couldn't pass it. I'm trying to make a "frequency ...
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1answer
92 views

Function generator design

So i was asked to design a function generator that eventually produces a sine wave at the output of the circuit and this is what i have come up with so far. A Schmitt trigger and then an integrator ...
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2answers
239 views

Input Bias Compensation Resistor Calculation for an Integrator

I have been reading the following tech note from Analog Devices that discusses designing an op amp circuit to compensate for the input bias current: https://www.analog.com/media/en/training-seminars/...
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2answers
143 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
432 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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1answer
653 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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6answers
3k 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
188 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
80 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
158 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
634 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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3answers
433 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
130 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
368 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
201 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
72 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
114 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 ...
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1answer
114 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 –...