Latest Filters Articles and Videos

Understanding and Minimizing Switching Noise Jitter (SNJ)

Switching noise jitter (SNJ) is an important concept to digest and a tricky problem to manage. Learn the background of SNJ and how employing innovative filtering technology can smooth the way.

August 17, 2023 by Steve Taranovich, TransSIP

Design of an Unweighted Audio Filter with Flat Frequency Response

This article presents the design of an unweighted (Z-weighted) audio filter with a flat frequency response from 20 Hz to 20 kHz for the measurement of audio noise.

July 23, 2023 by John Woodgate

An RMS Detector for a Wideband Voltmeter—Design and Operation

This project demonstrates the design and operation of a root-mean-squared (RMS) detector for inclusion in a wideband voltmeter. The RMS detector is useful for measuring certain signal types, including noise, since it provides an indication of the energy in a signal.

June 25, 2023 by John Woodgate

Photonic Chip Design Rethink Could Cut Data Center Energy Use

Leveraging novel photonic circuit designs, researchers hope to lower electricity consumption in data centers.

June 02, 2023 by Kristijan Nelkovski

Broadcom to Supply Apple’s 5G Components in the US

Despite Apple’s internal efforts, the company still needs to rely on third parties for wireless chips.

May 24, 2023 by Jake Hertz

Designing a Wideband Analog Voltage and Current Meter

Design a wideband analog multimeter to measure AC voltages and currents from 20 Hz to 1 MHz with a selectable sensitivity from 1 mV to 100 V, while the ammeter has a selectable current sensitivity of 10 mA to 10 A.

May 03, 2023 by John Woodgate

Understanding Limitations to Increasing SFDR in High-speed ADCs

Learn about two nonlinearity sources, spurious-free dynamic range (SFDR), and SNR (signal-to-noise ratio) in analog-to-digital converters (ADCs).

April 30, 2023 by Dr. Steve Arar

TI’s Active EMI Filters to Slash Size of Power Supply Designs

New ICs from Texas Instruments use active filtering to mitigate the impact of switched-mode power supply EMI.

March 22, 2023 by Jake Hertz

STMicro Rolls All-in-one Motion and Bone-conduction Sensor for Hearables

With its new sensor IC, STMicroelectronics hopes to enable a new class of hearables for applications like true wireless stereo (TWS).

March 06, 2023 by Jake Hertz

Rudolf Kalman: The Creator of Kalman Filters and Modern Control Theory

Rudolf Kalman is remembered for his fundamental impact on control systems and noise filtering—namely, through the invention of Kalman filters.

February 11, 2023 by Biljana Ognenova

Designing a Quadrature Network Using an All-pass Filter

Quadrature networks convert a single input signal into two outputs with a 90-degree phase difference. This article explains how to design quadrature networks using all-pass filters.

December 23, 2022 by John Woodgate

5 Online EE Resources I WOULD Have Been Thankful For

On this Thanksgiving Day, Jeff wonders what his EE college days would have been like if he’d had access to All About Circuits’ rich online resources.

November 24, 2022 by Jeff Child

RTD Signal Conditioning—4-Wire Configuration, Ratiometric Measurement, & Filtering

Learn about RTD (resistance temperature detector) signal conditioning through a four-wire configuration, ratiometric measurement, and input RC filters.

November 18, 2022 by Dr. Steve Arar

Magnetic Field Strength Meter and Calibrator

This project will explain how to develop a system to measure magnetic field emissions at frequencies up to 150 kHz from high-current power cables without cutting or disturbing the cable.

October 28, 2022 by John Woodgate

Ray Dolby, the Engineer Who Revamped Sound Technology

Before his name became a brand and a household word, Ray Dolby was a pioneer in noise reduction technology. His innovations revolutionized the audio and entertainment industries.

August 31, 2022 by Lianne Frith

Bussmann / Eaton ECMT-R Common Mode Chokes | New Product Brief

This New Product Brief (NPB) is part of a video series highlighting the features, applications, and technical specs of newly-released products.

August 21, 2022 by Mouser Electronics

Take Our 2022 EETech Global Engineering Survey

Join your engineering community peers and take our EETech 2022 Global Engineering Survey. You’ll get a summary of the results once they’re released. And you’ll be entered for a chance to win an Amazon card prize!

August 09, 2022 by Jeff Child