Latest Digital Filters Articles and Videos

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Digital or Analog? How Should I and Q Combining and Separation Be Done?

How should I and Q combining be done? Through analog or digital means? This article will discuss the basics of the analog and digital IQ approaches.

3 days ago by Wes Brodsky

Reducing Distortion in Tape Recordings with Hysteresis in SPICE

Summary

January 24, 2021 by Kevin Aylward

Reducing Second Harmonic Distortion with Symmetrical PCB Layout

Need a low-distortion ADC interface? In this article, we'll discuss how to reduce 2nd harmonic distortion by using symmetric PCB layout.

January 18, 2021 by Steve Arar

Computing Fast Fourier Transforms on the LPC55S69 MCU

This article investigates the Transform Engine, another part of the PowerQuad, which enables the LPC55S69 MCU to compute a Fast Fourier Transform (FFT).

December 17, 2020 by Eli Hughes, NXP Semiconductors

Efficient Orthogonal Variable Optimization Algorithm for Communication Systems

This article discusses an algorithm to find the optimum adjusted point in a two-dimensional space with orthogonal input vectors. The algorithm solves equations for intersecting circles based on measured data points.

December 15, 2020 by Russell Hoppenstein, Texas Instruments

Understanding Digital Filtering with Embedded Microcontrollers

Learn about the widely used methods for filtering and processing data samples in the time domain while taking a closer look at the Dual Biquad IIR engine of the PowerQuad unit in the LPC55S69 MCU. 

December 03, 2020 by Eli Hughes, NXP Semiconductors

More on Noise-Canceling Headphones: Adaptive Controllers in Active Noise Control Systems

Active noise control is a principle technology in noise-canceling headphones. But there's a nuanced part of the ANC conversation that warrants discussion: adaptive controllers and cancelation paths.

November 17, 2020 by Steve Arar

Understanding Active Noise Control Systems—the Tech Underlying Noise-Canceling Headphones

With more people working from home, noise-canceling headphones are ever-more prevalent. What circuitry underlies this popular technology?

November 05, 2020 by Steve Arar

Op-Amps as Low-Pass and High-Pass Active Filters

In this video we will explore a particularly important application of op-amps, namely, the design of high-performance filters that do not require inductors.

October 25, 2020 by Robert Keim

Researchers in Japan Claim New Quantum Circuit Can Compute the Fast Fourier Transform

Looking to build upon pre-existing quantum Fourier transform implementations, researchers in Japan have turned to the Fast Fourier Transform.

October 20, 2020 by Jake Hertz

Designing and Simulating EMC Filters with LTspice

In this article, we will review the different types of noise that are present in a circuit. We will also discuss how to perform an accurate simulation of an EMC filter with LTspice.

October 19, 2020 by Ignacio de Mendizábal

What Is the Sinc Function and Why Is It Important in Electrical Engineering?

This Frequent Engineering Question gives a quick overview of a mathematical function that appears frequently in digital signal processing.

September 23, 2020 by Robert Keim

How to Obtain the Temperature Value from a Thermistor Measurement

This article explains how to use an NTC or a PTC thermistor with an ADC, along with the various process techniques to convert ADC measured results into a usable temperature value.

August 18, 2020 by Gordon Varney, Texas Instruments

Precisely Capture Servo Motor Position Using a High-Speed Simultaneous Sampling ADC

Autonomous drones and robots utilize small motors. These fast-spinning mini motors require miniature encoders and IC package sizes. This article shows how an optical sinusoidal encoder provides a higher resolution and increased speeds with a 2x3 mm dual simultaneous-sampling SAR-ADC.

August 11, 2020 by Bonnie Baker, Maxim Integrated

What Is the Fourier Transform?

This article gives you essential information on a mathematical technique that plays an absolutely fundamental role in system design and signal processing.

July 30, 2020 by Robert Keim

What Is a Linear System?

This article explains the essential aspects of linear systems, which play a fundamental role in electrical engineering and signal processing.

June 17, 2020 by Robert Keim

Understanding Types of Lock-In Amplifiers and Related Noise Sources

This article is a general guideline on the main aspects of commercially-available amplifiers.

June 16, 2020 by Ignacio de Mendizábal

Wi-Fi Is a Power Guzzler. New Multi-Protocol Modules May Change the Game of Battery-Based IoT

Wi-Fi's high power consumption represents a serious challenge to battery-powered IoT products. But this may no longer be a problem with the digitally-dominant advanced radio architecture of two new modules from Innophase.

June 09, 2020 by Steve Arar

How Is the Laplace Transform Used in Circuit Design?

In this article, we briefly review how the Laplace transform can help us solve circuits involving damped and steady-state sinusoidal signals.

June 05, 2020 by Robert Keim

What Is Dynamic Range?

The concept of dynamic range appears frequently in engineering discussions. But what exactly does this term mean? And how does it apply to electronic circuits and systems?

June 03, 2020 by Robert Keim