Looking for opamp integrator circuit diagram

[RollingEEE]

I want a circuit diagram of an Opamp integrator that will have an input signal of rectifies square waves (15 V peak value, 2kHz frequency, and 0-50% duty cycle)

Please give me a circuit

 

[pakitos]

Re: Opamp Integrator

Do a small search on the net
www.discovercircuits.com may help

 

[tanzil_dhk]

Re: Opamp Integrator

here is a netlist for opamp integretor...u can change accordongly

* Schematics Netlist *



R_R1 $N_0002 $N_0001 1k
C_C1 $N_0001 $N_0003 10u
E_U2 $N_0003 0 VALUE {LIMIT(V(0,$N_0001)*1E6,-15V,+15V)}
V_V4 $N_0002 0 DC 0 AC 10
+SIN 1 1 10 0 0 0

 

[RollingEEE]

Re: Opamp Integrator

I know the theoretical circuits. I want a practical implementation

 

[tanzil_dhk]

Re: Opamp Integrator

well,
implementation in what???? not in pspice???

 

[Kral]

Re: Opamp Integrator

RollingEEE,
A true integrator output will ramp up at a constant rate while the square wave input input is non-zero. The output will remain constant while the input is zero. It will then ramp up (starting where it left off) at the constant rate when the input is again non-zero, This process will continue until the output reaches saturation. Is this what you want?
.
A true integrator is very difficult to implement because both input offset voltage and input bias current will cause the output to drift, even with zero input.
.
You can approximate an integrator with a low pass filter whose time constant is very long compared to the period of the input. This will mitigate the drift problem.
.
Let the integrator characteristic time equal Tau = RC, wher R is the input resistor, and C is the feedback resistor. Then the output ramp rate wil equal Vin/(RC).

 

[Ashish.chip]

Opamp Integrator

give your mail id....i'll mail u the circuit diagram.

 

[RollingEEE]

Re: Opamp Integrator

thanks for replying all. I just want the average value of a PWM square wave. Lets just say that the input will be a PWM wave and the output will be proportional to it's DC or average value. The output should be DC, with or without some small ripple.

 

[ashad]

Re: Opamp Integrator

please upload this info ........ i want to learn the about integrators

 

[Kral]

Re: Opamp Integrator

ashad,
This should get you started.
.
https://www.analog.com/UploadedFiles/Application_Notes/205489184AN357.pdf
**broken link removed**
https://www.aldinc.com/pdf/int_42003.0.pdf
**broken link removed**
**broken link removed**
Regards,
Kral