Latest Spectral Analysis Technical Articles

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Resolving the Signal Part 7: The Effects of Amplifier Noise on Delta-Sigma ADCs

This 12-part article series focuses on the impact of noise in delta-sigma ADCs. Part 7 shows how to analyze different amplifiers' effect on the noise of the same ADC.

July 03, 2018 by Bryan Lizon, Texas Instruments

Basics of Digital Down-Conversion in DSP

This article discusses digital down-conversion which is a digital-signal-processing technique widely used in digital radio receivers.

June 04, 2018 by Steve Arar

How to Low-Pass Filter a Square Wave

This article, part of AAC’s Analog Circuit Collection, presents a circuit that is a good choice when you need to remove high-frequency noise from a digital signal.

March 07, 2018 by Robert Keim

Resolving the Signal: Introduction to Noise in Delta-Sigma ADCs Part 2

In part 2 of this series, I'll continue the fundamental ADC noise discussion by covering how to measure ADC noise, noise specifications in ADC data sheets, and absolute versus relative noise parameters.

February 13, 2018 by Bryan Lizon, Texas Instruments

Choosing the Most Suitable MEMS Accelerometer for Your Application: Part 2

In part 2 of this article, we will focus on key specifications and features in the context of wearable devices, condition monitoring, and IoT applications.

December 22, 2017 by Chris Murphy, Analog Devices

High-Speed Waveform Generation with an MCU and a DAC

In this article, we’ll evaluate different firmware strategies in our pursuit of maximum-frequency analog signal generation.

December 08, 2017 by Robert Keim

Fixed-Point Representation: The Q Format and Addition Examples

Fixed-point representation allows us to use fractional numbers on low-cost integer hardware.

November 30, 2017 by Steve Arar

Learn about the Overlap-Add Method: Linear Filtering Based on the Discrete Fourier Transform

The overlap-add method allows us to use the DFT-based method when calculating the convolution of very long sequences.

October 25, 2017 by Steve Arar

Ultrawideband DPD: The Rewards and Challenges of Implementation in Cable Distribution Systems

This article looks at new technologies regarding the existing cable network, in particular, power amplifier digital predistortion.

October 24, 2017 by Patrick Pratt, Analog Devices

Linear Filtering Based on the Discrete Fourier Transform

The DFT provides an efficient way to calculate the time-domain convolution of two signals.

October 19, 2017 by Steve Arar

The Effect of Coefficient Quantization on the Performance of a Digital Filter

This article will verify that a suitable structure can reduce the sensitivity of a digital filter response to the coefficient quantization.

October 12, 2017 by Steve Arar

Design of FIR Filters Using the Frequency Sampling Method

This article will review the basics of the frequency sampling method for designing FIR filters.

September 29, 2017 by Steve Arar

Intelligence at the Edge Part 2: Reduced Time to Insight

In this multipart industrial IoT series, we will break down and explore the fundamental aspects of the edge node interpretation within the larger IoT framework: sensing, measuring, interpreting, and connecting data, with additional consideration for power management and security.

September 26, 2017 by Ian Beavers, Analog Devices

How to Use a Robot to Record and Transfer Audio Signals

This article provides detailed information on sampling audio signals and transferring the data to a PC for analysis.

September 15, 2017 by Robert Keim

An Introduction to the Fast Fourier Transform

This article will review the basics of the decimation-in-time FFT algorithms.

August 28, 2017 by Steve Arar

DFT Leakage and the Choice of the Window Function

This article will review the use of window functions to alleviate the DFT leakage.

August 23, 2017 by Steve Arar

Insight into the Results of DFT Analysis in Digital Signal Processing

This article attempts to give a deeper insight into the interpretation of DFT (direct Fourier transform) output.

August 17, 2017 by Steve Arar

An Introduction to the Discrete Fourier Transform

The DFT is one of the most powerful tools in digital signal processing which enables us to find the spectrum of a finite-duration signal.

July 20, 2017 by Steve Arar

Multirate DSP and Its Application in D/A Conversion

This article reviews the basics of D/A conversion and explains how multirate DSP can lead to a more efficient system.

June 30, 2017 by Steve Arar

Understanding and Eliminating 1/f Noise

This article defines 1/f noise and goes over ways to reduce or eliminate it in precision measurement applications.

June 05, 2017 by Robert Kiely, Analog Devices