Latest Digital Filters Technical Articles

Categories

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

Understanding Butterworth Filter Poles and Zeros

This article explores the Butterworth low-pass filter, also known as the maximally flat filter, from the perspective of its pole-zero diagram.

September 23, 2019 by Robert Keim

Integrator Limitations: The Op-Amp’s Gain Bandwidth Product

In this first part of a series of articles, we investigate the role of the op-amp’s gain-bandwidth product (GBP).

August 28, 2019 by Dr. Sergio Franco

Low-Noise Voltage References: Understanding the Noise Performance of a Voltage Reference IC

Working with a low noise voltage reference? Learn more about noise specifications and relevant voltage reference ICs.

July 01, 2019 by Steve Arar

Understanding the Temperature Coefficient of a Voltage Reference

How does temperature affect the output of a voltage reference? What is a temperature coefficient specification?

June 06, 2019 by Steve Arar

Understanding the First-Order High-Pass Filter Transfer Function

This article continues our discussion of s-domain transfer functions and their role in the design and analysis of analog filters.

May 24, 2019 by Robert Keim

Noise Analysis Using LTspice Tutorial

Learn how to simulate noise using LTspice and use this great tool to learn more about low-noise design.

May 22, 2019 by Stephen Colley

Understanding Low-Pass Filter Transfer Functions

This article provides some insight into the relationship between an s-domain transfer function and the behavior of a first-order low-pass filter.

May 17, 2019 by Robert Keim

What Is a Low Pass Filter? A Tutorial on the Basics of Passive RC Filters

What is filtering? Learn what resistor-capacitor (RC) low-pass filters are and where you can use them.

May 12, 2019 by Robert Keim

Improving Temperature Sensor Accuracy for Thermocouples and RTDs with Delta-Sigma Converters

This design solution evaluates the accuracy of thermocouples used for high-temperature measurements as well as resistance temperature detectors (RTDs) used for local cold-junction-compensation (CJC) points.

April 11, 2019 by Bonnie Baker, Maxim Integrated

DNL and INL Specifications of a DAC: Interpreting INL Shape

This article will examine some properties of the DNL and INL specifications.

March 18, 2019 by Steve Arar

Resolving the Signal Part 12: Reducing the Effects of Power-Supply Noise using Delta-Sigma ADCs

In part 12 of Resolving the Signal, we look at a power-supply noise design example to discuss which supplies are most critical when trying to increase a system's PSR. From that example, we offer best practices to maintain low power-supply noise and debugging tips for a system's overall noise performance.

January 29, 2019 by Bryan Lizon, Texas Instruments

How to Turn a Schematic into a PCB Layout: PCB Design for a Custom Inclinometer

So you have a schematic. How do you lay out your custom board? In this article, we'll go over the challenges and solutions I came across in designing a custom PCB for an inclinometer subsystem.

January 11, 2019 by Mark Hughes

Resolving the Signal Part 11: Understanding How Power-Supply Noise Affects Delta-Sigma ADCs

Part 11 of the Resolving the Signal series explores how power supplies contribute to unwanted noise, how to measure and quantify that noise, and how noise ends up impacting system performance.

December 11, 2018 by Bryan Lizon, Texas Instruments