Latest Digital Filters Technical Articles

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.

one day ago by Eli Hughes, NXP Semiconductors

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

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

JESD204B vs. JESD204C: What Designers Need to Know

Learn how the updated serial standard, JESD204C, addresses lane speed as well as inefficient 8B/10B coding and the impact those changes have when working on high-speed data converter board designs.

June 02, 2020 by Richard Zarr, Texas Instruments

Determining Dynamic Range of CCD Image Sensors

This article explains how CCD construction, operating parameters, and external signal-processing circuitry contribute to the maximum variation in luminance that CCD imaging hardware can capture.

May 29, 2020 by Robert Keim

Anti-Aliasing Filters: Applying Sampling Theory to ADC Design

This article examines an important aspect of the Nyquist–Shannon sampling theorem and explains its connection to the need for anti-aliasing filters in analog-to-digital conversion.

May 20, 2020 by Robert Keim

The Nyquist–Shannon Sampling Theorem: Exceeding the Nyquist Rate

This article continues our series on sampling theory by explaining the importance of oversampling in real-life mixed-signal systems.

May 18, 2020 by Robert Keim

The Nyquist–Shannon Theorem in the Frequency Domain

This article continues our discussion of sampling theory and introduces the concept of aliasing.

May 07, 2020 by Robert Keim

The Nyquist–Shannon Theorem: Understanding Sampled Systems

The Nyquist sampling theorem, or more accurately the Nyquist-Shannon theorem, is a fundamental theoretical principle that governs the design of mixed-signal electronic systems.

May 06, 2020 by Robert Keim

Understanding Digital Oscilloscope Sample Rate and Analog Bandwidth Specs

In this article, we’ll examine two important specifications of a digital oscilloscope: analog bandwidth and sampling rate.

March 24, 2020 by Steve Arar

Understanding Different Definitions of the Spurious Free Dynamic Range (SFDR) Specification

In this article, we’ll look at the spurious free dynamic range (SFDR) which is a popular specification for quantifying the linearity of a circuit.

December 01, 2019 by Steve Arar

Learn About SAR ADCs: Architecture, Applications, and Support Circuitry

In this article, we’ll first review the basic architecture of a SAR ADC and then take a look at one of its common applications.

October 24, 2019 by Steve Arar

Characterizing the Moog Filter

This is Part 3 of a series of articles about the Moog ladder filter. In this article, we'll define the characteristics of the Moog filter, including its properties.

October 23, 2019 by Sam Gallagher