Opamp Filters schematics


Posted on Jun 16, 2012

The figures below illustrate using opamps as active 2nd order filters. Three 2nd order filters are shown, low pass, high pass, and bandpass. Each of these filters will attenuate frequencies outside their passband at a rate of 12dB per octave or 1/4 the voltage amplitude for each octave of frequency increase or decrease outside the passband.


Opamp Filters schematics
Click here to download the full size of the above Circuit.

First order low or high pass cutoff frequency (-3dB point) = 1/(2pi*R*C) 2nd order low or high pass cutoff frequency (-3dB point) = 1/2pi(R1*R2*C1*C2)^.5 Example for 200 Hz cutoff frequency - R1=R2=7.95K, C1=C2=0.1uF




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Video modulator circuit
Control motor PWM schematic
bfo metal detector circuit
car cam
TA8136S Radio Control Transmitter Ic - Toshiba Semiconductor
BiQuad Filter Circuit Diagram using LM3403 Quad Op Amp
tunnel diode circuits
Magnetic field sensors circuit and serial interface application HMC1002
2Y- connection two-speed motor contactor control circuit of the four
Intelligent sensor signal processor configured MAX1463 precision pressure detection circuit



Top