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Understanding Noise in FM Systems: The Tone-Modulated Scenario, Part 2

Understanding Noise in FM Systems: The Tone-Modulated Scenario, Part 2

This article explores how combining signal and noise power reveals how the FM system’s output SNR scales with carrier amplitude and modulation index.


The MOS 6581 SID: Giving the Commodore 64 Its Voice

The MOS 6581 SID: Giving the Commodore 64 Its Voice

Bob Yannes built a three-voice analog synthesizer onto one die in 1982, and its imperfect filter became the signature sound of an era.


News Jul 31, 2026 by Luke James
A Dual 38W Power Amplifier: A Compact STA540-Based Stereo Audio Board

A Dual 38W Power Amplifier: A Compact STA540-Based Stereo Audio Board

This project brief describes how to build a compact dual-channel power amplifier module that delivers 38 W per channel into 4-ohm speakers using STMicroelectronics' STA540 audio amplifier IC.


Understanding Noise in FM Systems: The Tone-Modulated Scenario, Part 1

Understanding Noise in FM Systems: The Tone-Modulated Scenario, Part 1

Explore how frequency-modulated waves resist interference. We break down the demodulator architecture and derive the exact output signal power for a sinusoidal message.


A Precision Multi-Sensor Data Acquisition Module

A Precision Multi-Sensor Data Acquisition Module

Build a low-noise, 32-bit delta-sigma ADC board designed around the ADS1262. This 10-channel design features integrated signal conditioning for RTDs, thermocouples, and strain gauges.


Understanding the Noise Performance of AM Receivers with Envelope Detection

Understanding the Noise Performance of AM Receivers with Envelope Detection

Envelope detection is simple, but that simplicity has a noise-performance cost. Here’s how much SNR conventional AM gives up compared to its coherent counterparts.


The NE565: The Chip That Made the Phase-Locked Loop Practical

The NE565: The Chip That Made the Phase-Locked Loop Practical

Signetics packed a VCO and phase detector into one 14-pin part, turning a daunting feedback technique into something an ordinary engineer could build.


News Jul 17, 2026 by Luke James
An Ultra-Low-Noise Pre-Amp For Audio Applications

An Ultra-Low-Noise Pre-Amp For Audio Applications

Build an ultra-low-noise preamplifier with a JFE150 JFET and OPA202 op-amp, perfect for high-impedance sensors, hydrophones, guitar pickups, microphones, and turntables.


Nuvoton Rolls MCU Blending 24-bit ADC and Analog Front End

Nuvoton Rolls MCU Blending 24-bit ADC and Analog Front End

The Cortex-M23 microcontroller pairs metrology-grade signal acquisition with an LCD driver and Class-D voice output in a single LQFP128 package.


News Jul 15, 2026 by Luke James
Analyzing the Noise Performance of Coherent SSB Demodulators

Analyzing the Noise Performance of Coherent SSB Demodulators

Using a graphical approach, we show that coherent SSB demodulation leaves the input and output SNR unchanged, then compare its noise performance to DSB-SC and baseband systems.


Analog Devices EVAL-ADMX6001 Evaluation Board (ADMX6001-EBZ) | Featured Product Spotlight

Analog Devices EVAL-ADMX6001 Evaluation Board (ADMX6001-EBZ) | Featured Product Spotlight

Analog Devices EVAL-ADMX6001 Evaluation Board (ADMX6001-EBZ) is a high-performance reference platform for evaluating ultra-wideband, low-noise data acquisition systems. Watch and learn all about their features, specs, applications, and more!


A Four-Channel RS-422 Differential Line Receiver Module

A Four-Channel RS-422 Differential Line Receiver Module

This project brief describes how to build and use a four-channel differential line receiver module for balanced RS-422 and RS-485 data links.


Understanding SNR in DSB‑SC Coherent Detection: A Graphical Approach

Understanding SNR in DSB‑SC Coherent Detection: A Graphical Approach

Visualizing how correlated and uncorrelated signals combine offers an intuitive look at power transformation. See how this difference boosts baseband power to double the output SNR.


A Four-Channel RS-422 Differential Line Driver Module

A Four-Channel RS-422 Differential Line Driver Module

This project brief describes how to implement a four-channel differential line driver module for reliable long-distance data transmission over balanced twisted-pair lines.


Designing a Tuneable Ultrasonic Filter

Designing a Tuneable Ultrasonic Filter

Learn how to build a constant-bandwidth band-pass filter covering 20 kHz to 60 kHz, with an integrated frequency counter for precise tuning.


A 7 to 60 V Input Buck Converter: A Wide-Range DC-DC Step-Down Module

A 7 to 60 V Input Buck Converter: A Wide-Range DC-DC Step-Down Module

This project brief describes how to build a wide-range DC-DC buck converter capable of delivering a regulated 5.0 or 3.3 V output from input voltages ranging from 7 to 60 V.


Cirrus Logic Expands Pro Audio Converter Lineup With New 32-Bit Devices

Cirrus Logic Expands Pro Audio Converter Lineup With New 32-Bit Devices

Cirrus Logic introduced nine new 32-bit ADCs, DACs, and codecs for pro and prosumer audio systems with 115 dB dynamic range.


News Jun 23, 2026 by Joshua Tidwell
Evaluating the Noise Performance of Coherent DSB‑SC Demodulators

Evaluating the Noise Performance of Coherent DSB‑SC Demodulators

In this article, we'll learn how to calculate the noise power and signal-to-noise ratio (SNR) of a double-sideband suppressed-carrier communication system.


The BC109: Europe’s Low-Noise Transistor and the Silicon Behind the Fuzz Face

The BC109: Europe’s Low-Noise Transistor and the Silicon Behind the Fuzz Face

Created by Philips and Mullard in 1963, the BC109 was the low-noise member of a transistor family that dominated European electronics for two decades and later became a sought-after component in guitar effects.


News Jun 19, 2026 by Luke James
Beyond PLL Lock: Rethinking AC Phase Timing Confidence

Beyond PLL Lock: Rethinking AC Phase Timing Confidence

PLL lock doesn't mean your phase timing is trustworthy. Learn why AC synchronization systems need measured, validated phase references—not just loop convergence.