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One Circuit, Three Bode Plots: The Omnifilter

One Circuit, Three Bode Plots: The Omnifilter

This article, part of AAC’s Analog Circuit Collection, discusses a filter circuit that allows you to choose between a low-pass, a high-pass, and a band-pass response.


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.


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.


Circular Buffer: A Critical Element of Digital Signal Processors

Circular Buffer: A Critical Element of Digital Signal Processors

This article discusses circular buffering, which allows us to significantly accelerate the data transfer in a real-time system.


Structures for Implementing Finite Impulse Response Filters

Structures for Implementing Finite Impulse Response Filters

This article will review some basic structures to implement Finite Impulse Response (FIR) filters.


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.


Incorporating Microphone Functionality into a Robot System

Incorporating Microphone Functionality into a Robot System

In this article, we’ll look at a fairly straightforward circuit that enables a robot or other device to detect sound.


Projects Sep 11, 2017 by Robert Keim
Implementing a Low-Pass Filter on FPGA with Verilog

Implementing a Low-Pass Filter on FPGA with Verilog

Learn how to implement a moving average filter and optimize it with CIC architecture.


Multirate DSP and Its Application in D/A Conversion

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.


Amplify, Then Convert: A New High-Speed ADC Driver from Linear Tech

Amplify, Then Convert: A New High-Speed ADC Driver from Linear Tech

Good analog-to-digital conversion starts with good pre-ADC signal conditioning. Specialized devices such as the LTC6432-15 can help in this effort.


Exploring UC Berkeley’s Wearable Sweat Sensor for Monitoring Dehydration

Exploring UC Berkeley’s Wearable Sweat Sensor for Monitoring Dehydration

Researchers develop a wearable sensor for detecting important analytes in sweat for monitoring dehydration.


Isolated Analog-to-Digital Conversion: A New Sigma-Delta Modulator from Broadcom

Isolated Analog-to-Digital Conversion: A New Sigma-Delta Modulator from Broadcom

Isolation components, such as the ACPL-C799, allow you to transfer data without establishing a direct electrical connection between two parts of a system.


Finding Maximums in Noisy Data

Finding Maximums in Noisy Data

In this article, we'll first study types of noise and then try to eliminate them by filtering the data. Finally, we'll try to find peaks in that data.


Build Your Own LED Photography Ring Light

Build Your Own LED Photography Ring Light

LED ring flashes and lights can be a valuable tool for photographers. In this tutorial, we are going to build our own ring light out of LEDs!


Projects Jan 26, 2017 by Alex Udanis
Understanding Current-Voltage Curves of Non-Linear Devices

Understanding Current-Voltage Curves of Non-Linear Devices

This article discusses the I-V curves of passive non-linear devices such as diodes, transistors, and thyristors.


Focusing on Phase: The All-Pass Filter

Focusing on Phase: The All-Pass Filter

How do you design a filter that (ideally) has the same gain for all frequencies? And, furthermore, why would you want to do this?


Many Functions, One Tool: The Analog Discovery 2 from Digilent

Many Functions, One Tool: The Analog Discovery 2 from Digilent

An introduction to the Analog Discovery 2 by Digilent.


Understanding Linear-Phase Filters

Understanding Linear-Phase Filters

Linear phase response, also known as constant group delay, is an important property in some filter applications.


Understanding Complex-Conjugate Poles in Filter Theory

Understanding Complex-Conjugate Poles in Filter Theory

This technical brief explains the importance of complex-conjugate poles and second-order stages in optimizing filter performance.


The CMOS Transmission Gate

The CMOS Transmission Gate

This technical brief presents a simple MOSFET configuration that can be used as a voltage-controlled switch.