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How to Low-Pass Filter a Square Wave

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.


What Exactly Is a Quartz Crystal, Anyways? A Look at Quartz Crystal Oscillators

What Exactly Is a Quartz Crystal, Anyways? A Look at Quartz Crystal Oscillators

This article explains some theory behind an extremely common electronic component.


Digitally Adjust DC-to-DC Voltage Regulators: A PMBus-Controlled Current DAC

Digitally Adjust DC-to-DC Voltage Regulators: A PMBus-Controlled Current DAC

A PMBus-controlled, bidirectional current DAC (digital-to-analog converter) that can adjust the output voltage of a DC/DC converter.


News Mar 02, 2018 by Nick Davis
How to Monitor Current with an Op-Amp, a BJT, and Three Resistors

How to Monitor Current with an Op-Amp, a BJT, and Three Resistors

This article, part of AAC’s Analog Circuit Collection, explains the functionality of a clever circuit that accurately measures supply current.


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

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.


Need a Current Regulator? Use a Voltage Regulator!

Need a Current Regulator? Use a Voltage Regulator!

This article, part of AAC’s Analog Circuit Collection, shows you how linear voltage regulators can also be handy in constant-current applications.


When a Diode Simply Isn’t Good Enough: The Superdiode

When a Diode Simply Isn’t Good Enough: The Superdiode

This article, part of AAC’s Analog Circuit Collection, discusses an interesting circuit in which an op-amp and an ordinary diode work together to create a superdiode.


One Crystal Oscillator to Replace Many: I2C User-Programmable XO for Frequencies of 0.2 to 1500 MHz

One Crystal Oscillator to Replace Many: I2C User-Programmable XO for Frequencies of 0.2 to 1500 MHz

A new high-performance I2C-programmable crystal oscillator (XO) that delivers an ultra-low-jitter output frequency.


News Feb 05, 2018 by Nick Davis
Implementing Your Phase-Shift Oscillator: Frequency Response and Amplitude Stabilization

Implementing Your Phase-Shift Oscillator: Frequency Response and Amplitude Stabilization

This article, part of AAC’s Analog Circuit Collection, explores a handy circuit that can generate sustained sinusoidal oscillations.


Extending Bandwidth to Crush X-Band Frequencies Using a Track-and-Hold Sampling Amplifier and RF ADC

Extending Bandwidth to Crush X-Band Frequencies Using a Track-and-Hold Sampling Amplifier and RF ADC

In this article, I show that designers can achieve 10 GHz bandwidth when using a THA in front of one of Analog Dialogue's RF market converters.


How to Generate a Sine Wave: The Phase-Shift Oscillator

How to Generate a Sine Wave: The Phase-Shift Oscillator

This article, part of AAC’s Analog Circuit Collection, explains a fairly straightforward circuit that can be used as part of an analog oscillator.


How to Build Your Own Function Generator Using Analog Devices’ AD9833

How to Build Your Own Function Generator Using Analog Devices’ AD9833

Tired of using your PC or mobile phone as a signal generator? It’s time to upgrade to a standalone one by making it yourself.


Projects Jan 17, 2018 by Cezar Chirila
An Op-Amp Limiter: How to Limit the Amplitude of Amplified Signals

An Op-Amp Limiter: How to Limit the Amplitude of Amplified Signals

This article, part of AAC’s Analog Circuit Collection, explores the design and functionality of an op-amp-based limiter.


High-Speed Waveform Generation with an MCU and a DAC

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.


Projects Dec 08, 2017 by Robert Keim
How to Generate a High-Precision Waveform Using a DAC and a Custom PCB

How to Generate a High-Precision Waveform Using a DAC and a Custom PCB

In this article, we’ll develop firmware that will serve as the basis for high-precision, high-speed signal generation.


Projects Dec 01, 2017 by Robert Keim
EMI Compliance: A New Customizable Spread Spectrum Oscillator from SiTime

EMI Compliance: A New Customizable Spread Spectrum Oscillator from SiTime

SiTime announces their new spread spectrum oscillator that is advertised to ensure emissions compliance.


News Nov 17, 2017 by Nick Davis
Implementing an Electronic Leveling Tool

Implementing an Electronic Leveling Tool

While it can be challenging to design electronic versions of precision tools, in this Industry Article we design an electronic level that matches the features of a conventional tool.


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

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.


Improved DAC Phase Noise Measurements Enable Ultralow Phase Noise DDS Applications

Improved DAC Phase Noise Measurements Enable Ultralow Phase Noise DDS Applications

In this article, we show measured improvements of over 10 dB at 10 kHz offsets using the AD9164 DAC.


Design of FIR Filters Using the Frequency Sampling Method

Design of FIR Filters Using the Frequency Sampling Method

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