Category: Filters

Decibels

When designing or working with amplifier and filter circuits, some of the numbers used in the calculations can be very large or very small. For

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Sallen and Key Filter

The Sallen and Key Filter design is a second-order active filter topology which we can use as the basic building blocks for implementing higher order filter circuits,

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Second Order Filters

Second Order Filters which are also referred to as VCVS filters, because the op-amp is used as a Voltage Controlled Voltage Source amplifier, are another important

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State Variable Filter

State variable filters use three (or more) operational amplifier circuits (the active element) cascaded together to produce the individual filter outputs but if required an

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