# Questions tagged [integrator]

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### DC gain of non-inverting integrator / Derivation of DC results from transfer function

(The pictured circuit contains a serious mistake, see my answer for more detail. I decided to leave the question in its original form for educational purposes, though.) Setting The (sub-)circuit in ...
332 views

Here is my try at the problem, A 3.5 digit implies the count varies from 0 to 1999.So for a 2V full scale the LSB or the resolution is 1mV. Now the input is integrated for 300ms and the integrated ...
730 views

### How is the integration time set for a camera?

I using the TSL1401R-LF Linescan Camera Module, which reads in a 1 X 128 line of pixels, and I'm having trouble understanding how the integration time is set for this device. I understand from page 9 ...
2k views

### voltage controlled oscillator

Given below is a VCO circuit. Can anyone explain how the components work (especially the resistors and capacitors) and why the resistor and capacitor values are selected so. and what are the values to ...
11k views

### Difference between an ideal integrator and a practical one

I only learned about the ideal integrator design (top circuit), but when I searched for a practical model for an integrator I found it was like the one in the bottom circuit. Two new elements, Rf and ...
2k views

### AC Op-amp Integrator with DC Gain Control

I found a link http://www.electronics-tutorials.ws/opamp/opamp_6.html that discusses about AC Op-amp Integrator with DC Gain Control I am wondering how I derive the frequencies (1/CR2 and 1/CR1) ???
341 views

### op amp circuit application

I am unable to determine the function of this circuit. The second stage looks like an integrator, but the presence of a pot in stage 1 really confuses me...
2k views

### What is the purpose of resistor at the input of the OpAmp?

I have just seen this integrator circuit here. As seen from the picture, there is a resistor at the positive input of the OpAmp. Could you explain what is the purpose of this resistor?
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### Leaky integrator from Switched capacitor integrator?

I have seen leaky integrator circuit using a capacitor and resistor in parallel between inverting terminal and the output of an op-amp. But I was wondering if it is possible to make a leaky integrator ...
167 views

### Charge pulse to current conversion

I have a photodetector device that outputs charge pulses proportional to incident light. From the device's datasheet (here) and some infor provided by the manufacturer (here), I've understood that ...
1k views

### Op Amp Integrator not working with DC Source

I am creating an Op-Amp Integrator circuit in Multisim. It seems to work for sinusoidal voltage inputs, square wave inputs, etc but when I connect it to a DC source the output voltage (channel A in ...
501 views

### RC integrator behavior

I am trying to implement an RC integrator circuit in my design. The purpose of this circuit is to convert input pulse signals swinging between 0 to 2.5V into a ramp signal. The integrator circuit was ...
2k views

### Generation of triangle wave at 15KHz frequency

I want to generate a triangle wave with peak value 5V. I am using a 555 timer to generate square wave pulse of frequency 15KHz. Then I passes this square wave through a active integrator ( A opamp ...
12k views

### What is the purpose of a resistor on the non-inverting terminal of an Op-Amp Integrator? [duplicate]

I have seen this type of circuit design a few times, but am not sure why it is needed. Considering the schematic below, what is the purpose of resistor R3?
733 views

### Comparators as op-amp integrator

So I figured I need an audio range function generator and was thinking of generating a square wave with a 555 and then using op-amps to integrate it into a triangle and sine. Since I happen to have ...
97 views

### Anti-windup scheme for PID controller [duplicate]

this is the designed pid controller and i am using TL084 op-amps which has +15 volts and -15 volts as their supply. when the error is generated, due to integrator the control signal(Vc) output is ...
3k views

### Anti-wind up scheme in the implementation of PID controller

I want to implement designed PID controller. But I am facing the problem of how to limit the saturation limit in both positive and negative direction? I tried using zener diode, but I would like to ...
671 views

### What does the feedback capacitor do in Right-Leg-Driver?

It so happens I have seen some people mention about connect a feedback capacitor across the opamp for RLD would improve something better. Can someone capable to explain about the use of the ...
687 views

### Confused about exponential equation in First Order Integrator Circuit

I have a problem above, where the question goes as such: I have a Miller Integrator Circuit as such: Now, I pass in a square wave pulse of 1V height and 1ms Width Now, I have a resistor of Rf = 1M ...
385 views

### Film capacitors, replacing with ceramics

I've been watching through hole film caps disappear. I've used a bunch of these in thermal control loops, http://www.digikey.com/product-detail/en/ECQ-E1106KF/EF1106-ND/56416 Still making 'em, but ...
181 views

### Integrator with Voltage on IN+ and measuring Vout and V-?

I know the ideal integrator topology and output equation. But - what is the affect of connecting a supply at the positive input (instead of GND)? How can that be calculated mathematically for NODE1 ...