Questions tagged [integrator]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0
votes
1answer
39 views

An Integrator Reset Circuit not working properly

I am trying to integrate the output of a Rogowski coil , with an inverting integrator with a reset circuit. I want to have the voltage level 0V during the off time of my switch, however after reset ...
1
vote
0answers
28 views

Derivation of the compensating resistor in integrator with DC gain control [duplicate]

Hi all in EE stackchange, I wonder how the compensating resistor (\$R_3\$) in integrator with DC gain control equals \$R_3 = R_1 || R_2\$, which is to offset effect by the input bias current. I was ...
0
votes
2answers
80 views

Numerical output of RC Circuit

I am trying to numerically generate the output voltage of an RC Filter to that of Plot 1 using the following formula. Using the following code: ...
0
votes
1answer
56 views

How to remove the DC offset from the output of my op-amp integrator?

I am trying to simulate a active integrator for Rogowski coil based current sensing application. Following is my circuit. The current to be sensed is passed through the inductance L2 which is ...
1
vote
1answer
65 views

Settling time of an op-amp integrator

I am trying to simulate an op-amp integrator with a high bandwidth op-amp LTC6253. When I apply a 2mv-p2p signal centered at zero voltage, the integrator settles with an exponential voltage envelope ...
1
vote
2answers
100 views

Increasing sensitivity of photodiode amplifier

I have build a 2-stage amplifier circuit for amplifying the current from an InGaAs photodiode. It uses 2 OPA4350 op-amps. The first stage is a TIA with a feedback resistor = 1MΩ. The 2nd stage is a ...
0
votes
0answers
33 views

Does the op-amp integrator drift error due to offset voltage and bias currents depend on the configuration inverting or non-inverting?

I have made the following two circuits to check for integrator drift errors in LTSPICE. I have grounded both inputs, so that only the offset voltage and bias currents are integrated. I expect ramps as ...
1
vote
0answers
45 views

Differential integrator vs standard

I want to integrate/amplify a very small signal (relatively short pulses of 100ns to 4ms, necessitate high-bandwidth components minimum 40MHz+). The capacitors will be switched (shorted) when not in ...
9
votes
2answers
822 views

RC integrator: why does it convert a triangular wave into a sine wave?

The output voltage of an RC integrator circuit is proportional to the integral of the input voltage. This means that a triangular wave should transform into a quadratic curve (since the integral of a ...
0
votes
2answers
69 views

LTspice simulation doesn't agree with predicted transfer function

I am trying to create an integrator in LTspice that I will use as a subcircuit in a signal chain later, but can't get the simulation results to agree with my theoretical calculations. I derived the ...
0
votes
1answer
43 views

How gain is changed in this Op-AMP integrator?

Hi, I am simulating this circuit for personal development. The gain of the integrator can be calculated using the following formula: Gain = -Rf/R1 (1/(1+(2 x pi x f x C1 x Rf))) But, how to calculate ...
0
votes
1answer
49 views

Problem with a tracking LM337 stability

I'm building a dual rail tracking power supply, for the negative supply because the current is not going to exceed ~200 mA I decided to use LM337 both for simplicity and stability of the circuit (so I ...
0
votes
1answer
69 views

Help me understand this voltage to frequency converter circuit

I got the schematics for a voltage to frequency converter (VFC) from https://www.multisim.com/content/6L...amp-comparator-voltage-controlled-oscillator/. I tried it in TINA-TI and it works. Can ...
1
vote
2answers
68 views

What is the role of the Op-Amp integrator in this circuit?

Helo dier community! I got a 400 Hz broken Power Inverter and reverse-engineered the circuit just for the simplicity of repairing it. Then I got deeper in and started to understand the engineering ...
1
vote
2answers
134 views

Stick-Slip Piezo Linear Stage Driver - Prevent the Load from Changing Driver Output?

I am currently trying to develop a circuit that generates ramp waveforms to control the motion of a piezo linear stage. Specifically, two waveforms need to be possible to output: a slow ~250us upward ...
1
vote
0answers
52 views

Integrator circuit RC time constant and integration time

I have hardware which performs current to voltage conversion. Hardware is design is Transimpedence amplifier, opamp integrator, adc for digital conversion. Transimpedence amplifier supports two gain ...
0
votes
2answers
102 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 ...
0
votes
2answers
54 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 ...
0
votes
3answers
89 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 ...
0
votes
1answer
90 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 ...
2
votes
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 ...
1
vote
1answer
73 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 ...
1
vote
1answer
127 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 ...
0
votes
0answers
17 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 ...
1
vote
2answers
93 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 ...
6
votes
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 ...
1
vote
1answer
71 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 ...
0
votes
1answer
80 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. (...
0
votes
1answer
206 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 ...
0
votes
2answers
442 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 ...
0
votes
1answer
56 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 ...
0
votes
1answer
108 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 : ...
6
votes
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?
3
votes
2answers
85 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 ...
1
vote
1answer
233 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-...
0
votes
1answer
218 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
2
votes
3answers
170 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 ...
1
vote
1answer
247 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 ...
0
votes
1answer
67 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 ...
0
votes
1answer
533 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 ...
2
votes
1answer
246 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 ...
2
votes
1answer
353 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 ...
0
votes
1answer
112 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 ...
3
votes
2answers
491 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 ...
1
vote
3answers
210 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 ...
1
vote
3answers
419 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 ...
1
vote
3answers
1k 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 ...
3
votes
1answer
300 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 ...
0
votes
1answer
96 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 ...
0
votes
2answers
380 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/...