Navigation:: Home >> Circuits and design >> this page

Operational Amplifier / Op-Amp Band Pass Filter

- basic operational amplifier / op-amp active band pass filter circuit with details of how to determine the values for the frequencies required.


Op-amp circuits include:
    •  Operational amplifier circuits
    •  Inverting op-amp
    •  Non-inverting op-amp
    •  Op-amp high pass filter
    •  Op-amp low pass filter
    •  Op-amp bandpass filter
    •  Op-amp variable gain amplifier
    •  Op-amp notch filter circuits
    •  Operational amplifier multivibrator
    •  Op-amp bistable
    •  Op-amp comparator
    •  Op-amp Schmitt trigger
    •  Op-amp integrator
    •  Op-amp differentiator

The design of band pass filters can become very involved even when using operational amplifiers. However it is possible to simplify the design equations while still being able to retain an acceptable level of performance of the operational amplifier filter for many applications.

Circuit of operational amplifier active band pass filter

Circuit of the operational amplifier active band pass filter

Operational amplifier active band pass filter equations

As only one operational amplifier is used in the filter circuit, the gain should be limited to five or less, and the Q to less than ten. In order to improve the shape factor of the operational amplifier filter one or more stages can be cascaded. A final point to note is that high stability and tolerance components should be used for both the resistors and the capacitors. In this way the performance of the operational amplifier filter will be obtained.

By Ian Poole

. . . . .     << Previous     | Next >>


More Op amp circuits . . . . .

Op-amp basics Op-amp gain Inverting op-amp Non-inverting
High pass filter Low pass filter Bandpass filter Variable gain amp
Notch filter Multivibrator Bistable Comparator
Schmitt trigger Integrator    

Read more circuit design tutorials . . . . .

Transistor circuit design Transistor Darlington FET circuit design SCR circuit design
Op amps Logic Design for EMC Design for ESD
Capacitance multiplier      

Share this page




Sensors, Actuators, and Their Interfaces: A Multidisciplinary Introduction
Sensors, Actuators, and Their Interfaces: A Multidisciplinary Introduction

Nathan Ida
Sensors and actuators are becoming increasingly important. While they had...
Read more . .

USA bookstore UK bookstore


Radio-Electronics.com is operated and owned by Adrio Communications Ltd and edited by Ian Poole. All information is © Adrio Communications Ltd and may not be copied except for individual personal use. This includes copying material in whatever form into website pages. While every effort is made to ensure the accuracy of the information on Radio-Electronics.com, no liability is accepted for any consequences of using it. This site uses cookies. By using this site, these terms including the use of cookies are accepted. More explanation can be found in our Privacy Policy