Latest Digital Filters Articles and Videos

Precision analog-to-digital converters can be tricky. Here are some pointers to get the most out of them.

Precision analog-to-digital converters can be tricky. Here are some pointers to get the most out of them.

Learn how to make more efficient designs for RF applications using Zero-IF architecture.

Learn how to make more efficient designs for RF applications using Zero-IF architecture.

How do you design a filter that (ideally) has the same gain for all frequencies? And, furthermore, why would you want to do this?

How do you design a filter that (ideally) has the same gain for all frequencies? And, furthermore, why would you want to do this?

In part 2 of the LED saber project, we'll assemble the power and audio systems.

In part 2 of the LED saber project, we'll assemble the power and audio systems.

Linear phase response, also known as constant group delay, is an important property in some filter applications.

Linear phase response, also known as constant group delay, is an important property in some filter applications.

This technical brief explains the importance of complex-conjugate poles and second-order stages in optimizing filter performance.

This technical brief explains the importance of complex-conjugate poles and second-order stages in optimizing filter performance.

Scientists at EPFL have invented an acoustic prism which separates different frequency components of sound similar to an…

Scientists at EPFL have invented an acoustic prism which separates different frequency components of sound similar to an optical prism.

In this article, we will discuss several design examples of FIR filters using the window method. The simulated frequency…

In this article, we will discuss several design examples of FIR filters using the window method. The simulated frequency response of the designed filters will be compared with the target specifications.

ADCs (analog-to-digital converters) can be described as either Nyquist-rate or oversampled converters. The Delta-Sigma…

ADCs (analog-to-digital converters) can be described as either Nyquist-rate or oversampled converters. The Delta-Sigma ADC belongs to the oversampled family of converters. It relies upon oversampling and noise shaping to achieve high-resolution conversions.

Learn how to use filter specs to help choose the best window parameters for your FIR filter design.

Learn how to use filter specs to help choose the best window parameters for your FIR filter design.

In this article, we will discuss the fact that choice of different window functions involves a trade-off between the main…

In this article, we will discuss the fact that choice of different window functions involves a trade-off between the main lobe width and the peak sidelobe (PSL). To gain more insight, we will calculate the Fourier transform of a triangular window using the Fourier transform of a rectangular window. The connection between these two windows helps us to better understand the aforementioned trade-off.

A smoother transition band and ripples in the passband are the most important differences between the ideal filters and…

A smoother transition band and ripples in the passband are the most important differences between the ideal filters and those designed by window method. This article tries to provide a deeper insight into how truncation leads to these features.

In this article, we’ll compare active and passive filters and look at some common second-order active topologies.

In this article, we’ll compare active and passive filters and look at some common second-order active topologies.

In this article, we'll review the basic concepts in digital filter design. We'll also briefly discuss the advantages of…

In this article, we'll review the basic concepts in digital filter design. We'll also briefly discuss the advantages of FIR filters over IIR designs, e.g. stability and linear-phase response. Finally, we'll go over an introduction to designing FIR filters via the window method.

Part Three in this three-article series shows you how to generate values for a discrete sinusoid and continuously convert…

Part Three in this three-article series shows you how to generate values for a discrete sinusoid and continuously convert this data into an analog signal without overburdening the CPU.

In this article we’ll use the SAM4S Xplained Pro development platform to get some hands-on experience with a PWM DAC.

In this article we’ll use the SAM4S Xplained Pro development platform to get some hands-on experience with a PWM DAC.

This article covers everything you need to know to generate pulse-width-modulated signals with Atmel’s SAM4S Xplained…

This article covers everything you need to know to generate pulse-width-modulated signals with Atmel’s SAM4S Xplained Pro development board.

In this article we will take a closer look at how to effectively low-pass filter a PWM signal into an analog voltage.

In this article we will take a closer look at how to effectively low-pass filter a PWM signal into an analog voltage.

If your microcontroller doesn’t have a digital-to-analog converter, you can make a passable replacement with nothing…

If your microcontroller doesn’t have a digital-to-analog converter, you can make a passable replacement with nothing more than a pulse-width-modulated signal and a low-pass filter.