选择您的滤波电路的运算放大器

Analog filters can be found in almost every electronic circuit.
Audio systems use them for preamplification and equalization.
In communication sys tems, filters are used for tuning specific
frequencies and eliminating others. But if an analog signal is
digitized, low-pass filters are always used to prevent aliasing
errors from out-of-band noise and interference.
Select the Right Operational Amplifier
for your Filtering Circuits
By Bonnie C. Baker, Microchip Technology Inc.


ANALOG DESIGN NOTE ADN003
Introduction
Analog filters can be found in almost every electronic circuit.
Audio systems use them for preamplification and equalization.
In communication systems, filters are used for tuning specific R3
frequencies and eliminating others. But if an analog signal is
digitized, low-pass filters are always used to prevent aliasing C1
errors from out-of-band noise and interference. R1 R2