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A 20-kHz, Third-Order Low-Pass Filter (OPA335)

2015-01-13 06:06  
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This article describes A 20-kHz, Third-Order Low-Pass Filter (OPA335). The content is very simple, very helpful. Components in this article can help you understand better understanding of this article. For example, in this article, you can go to find and buy these components:OPA335.

This is a third order low pass filter that has corner frequency of 20kHz. It is twice as high as the auto-zero clock frequency. Here is the circuit :

A 20 kHz Third Order Low Pass Filter circuit schematic diagram

The input signal operation is allowed to across its entire gain bandwidth because intermodulation? and aliasing noise are highly attenuated. This circuit also has rail-to-rail drive capability provided by amplifier’s output, allowing for a high signal-to-noise ratio at low supply voltages.


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