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An A-Weighted Analog Filter that Mimics the Response of the Human Ear

An A-Weighted Analog Filter that Mimics the Response of the Human Ear

In this project, we design an A-weighted analog noise filter for audio frequencies. The filter provides a variable frequency gain response that is similar to that of our hearing.


Projects Oct 29, 2023 by John Woodgate
KEMET Three-Phase Metal Box EMI-RFI Filters | New Product Brief

KEMET Three-Phase Metal Box EMI-RFI Filters | New Product Brief

KEMET GTX Three-Phase Metal Box EMI-RFI Filters are specifically engineered to meet diverse three-phase EMC requirements for current ranges spanning from 30 to 60 Amps. Watch and learn all about their features, specs, applications, and more!


Keysight Unwraps EDA Tool Suite for Boosting RF and 5G Design Productivity

Keysight Unwraps EDA Tool Suite for Boosting RF and 5G Design Productivity

The Keysight EDA 2024 tool suite promises to provide end-to-end design, modeling. and simulation with “shift left” workflow tools designed to increase productivity in the RF/5G world.


News Sep 30, 2023 by Duane Benson
Understanding and Minimizing Switching Noise Jitter (SNJ)

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.


Design of an Unweighted Audio Filter with Flat Frequency Response

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.


Projects Jul 23, 2023 by John Woodgate
An RMS Detector for a Wideband Voltmeter—Design and Operation

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.


Projects Jun 25, 2023 by John Woodgate
Photonic Chip Design Rethink Could Cut Data Center Energy Use

Photonic Chip Design Rethink Could Cut Data Center Energy Use

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


News Jun 02, 2023 by Kristijan Nelkovski
Broadcom to Supply Apple’s 5G Components in the US

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.


News May 24, 2023 by Jake Hertz
Designing a Wideband Analog Voltage and Current Meter

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.


Projects May 03, 2023 by John Woodgate
Understanding Limitations to Increasing SFDR in High-speed ADCs

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).


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

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.


News Mar 22, 2023 by Jake Hertz
STMicro Rolls All-in-one Motion and Bone-conduction Sensor for Hearables

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).


News Mar 06, 2023 by Jake Hertz
Rudolf Kalman: The Creator of Kalman Filters and Modern Control Theory

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.


News Feb 11, 2023 by Biljana Ognenova
Designing a Quadrature Network Using an All-pass Filter

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.


Projects Dec 23, 2022 by John Woodgate
5 Online EE Resources I WOULD Have Been Thankful For

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.


News Nov 24, 2022 by Jeff Child
RTD Signal Conditioning—4-Wire Configuration, Ratiometric Measurement, & Filtering

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.


Magnetic Field Strength Meter and Calibrator

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.


Projects Oct 28, 2022 by John Woodgate
Ray Dolby, the Engineer Who Revamped Sound Technology

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.


News Aug 31, 2022 by Lianne Frith
Bussmann / Eaton ECMT-R Common Mode Chokes | New Product Brief

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.


Take Our 2022 EETech Global Engineering Survey

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!


News Aug 09, 2022 by Jeff Child