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Passive Filters:  Crystal Circuits
Passive Filters -- Main Page
Last Updated on: Thursday, April 07, 2016 01:01 PM


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Basic Introduction to Filters: Active, Passive & Switched-Capacitor -  National Semiconductor Application Note....[App Note - ]
Notch RC Notch Filter Twin T -  The twin T notch filter can be used block an unwanted frequency or if placed around an op-amp as a bandpass filter. The notch frequency occurs where the capacitive reactance equals the resistance Xc=R and if the values are close, the attenuation can be very high and the notch frequency virtually eliminated. (electronic schematic / circuit added 4/02)
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