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Volume 49 ó June 2015

Timely Information

Application Notes

Circuits from the Lab

New-Product Briefs

Rarely Asked Questions

Technical Articles


Notes From the Editor




Analog-to-Digital Converters

Application Specific

Audio and Video Products


Clock and Timing

Digital-to-Analog Converters

Interface and Isolation

Linear Products



Power Management

Processors and DSP

RF and Microwave


Switches and Multiplexers


Analog Dialogue--Since 1967

Feature Articles: Products, Applications, Technology, Design Ideas, Tutorials, and Measurement Techniques

The Basics of MEMS IMU/Gyroscope Alignment

Sensor misalignment is often a key consideration for high
performance motion control systems that use MEMS inertial measurement units (IMUs) in their feedback loops. For the gyroscopes in the IMU, sensor misalignment describes the angular difference between each gyroscopeís axis of rotation and the system defined inertial reference frame, also known as the global frame. Managing the impact that misalignment has on sensor accuracy can require unique packaging, special assembly processes, or even complex inertial testing in the final configuration. This article defines and explores three basic alignment concepts that are necessary for the designer to understand and evaluate when architecting an IMU function for a system: error estimation, understanding misalignment impact on key system behaviors, and electronic alignment (after installation).

Multifunction: a Dilemma or Reality?

Next-generation aerospace and defense system designers are being pushed to develop advanced, highly configurable systems that combine a range of functions and requirements, integrating functionality that would have historically been implemented by separate standalone systems. Clearly this has the benefit of reducing the number of subsystems that need to be supported by any mission platform, reducing the overall size, weight, and power (SWaP), but with the further need to support cognitive and real-time configurability, the challenges can seem daunting. This article looks at a new generation of high performance, wideband components that are potentially providing a solution to this challenge, supporting the high performance levels required for each system, but with a broad enough operating range to meet the multifunction challenge.

Mystery Spur Explained: Donít Blame the DDC!

Can you explain the existence of a mystery spur in my ADC's output spectrum?


Low-Power Synchronous Demodulator Design Considerations

This article looks at some design considerations for sensor signal conditioning using synchronous demodulation in systems with strict power and cost constraints. When carefully designed, analog systems are hard to beat for simplicity, low cost, and low power consumption. This architecture performs most of the signal processing in the analog domain.


No Pain, High Gain: Building a Low-Noise Instrumentation Amplifier with Nanovolt Sensitivity

Building a voltage measurement system with nanovolt sensitivity presents many design challenges. The best available op amps can achieve less than 1 nV/√Hz noise at 1 kHz, but the nature of low-frequency noise limits the achievable noise to about 50 nV p-p over a 0.1 Hz to 10 Hz band. A well-behaved low-noise in-amp simplifies system design and construction, and reduces residual errors due to common-mode voltage, power-supply fluctuations, and temperature drift.


Murphy Rules!

Why donít my amplifiers and converters work correctly in the published circuit?

...Recent Articles

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Analog Dialogue is the technical magazine of Analog Devices. It discusses products, applications, technology, and techniques for analog, digital and mixed-signal processing.

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