6 results found for Analog/Mixed-Signal Design, displaying items 1 - 6
August 28, 2008 Using Delta-Sigma Can Be As Easy As ADC (Part 2)
In my previous column, I took a historical approach to delta-sigma modulation with the single-slope converter (May 8, p. 18, ED Online 18747). Jim Williams of Linear Tech responded, and he sent me a copy of a 1949 article by D.H. Wilkinson on single-slope analogto- digital converters (ADCs). “I’m aware of their obvious weaknesses, but the simplistic elegance of the...
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Dave Van Ess
June 6, 2008
Squeeze 10-Bit Performance From An 8-Bit ADC, Part 2: Triangular Dithering
You don’t want to burden your design with the extra cost of a higher-resolution analog-to-digital converter (ADC). But because of board-space limitations, adding an external ADC may not be acceptable. Fortunately, you can get 10-bit performance with an 8-bit ADC by implementing triangular dither.
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Dave Van Ess
May 8, 2008 Using Delta-Sigma Can Be As Easy As ADC
As an application engineer, I spend a lot of time convincing customers that a delta-sigma modulating analog-to-digital converter (ADC), or DSM, would be the best choice for their particular application. Then they come up with all sorts of excuses for why they prefer a successive-approximation ADC. I’ve come to the conclusion that they prefer successiveapproximation ADCs because they fundamentally don’t understand how a DSM works, perhaps because DSMs involve...
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Dave Van Ess
May 5, 2008
Squeeze 10-Bit Performance From An 8-Bit ADC, Part 1: Additive Dithering
You don’t want to burden your design with the extra cost of a higher-resolution ADC. And because of board-space limitations, adding an external ADC may not be acceptable. Fortunately, you can get 10-bit performance with an 8-bit ADC by averaging multiple samples. This process is called oversampling.
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Dave Van Ess
February 28, 2008 Squeeze 10-Bit Performance From An 8-Bit DAC
Few things are more frustrating than a requirement for some feature that exceeds the ability of your present hardware. Say you’re designing a product that has historically required an 8-bit digital-to-analog converter (DAC). Conveniently integrated on the system microcontroller, the DAC has never been a problem until marketing suddenly insists that it is absolutely necessary for the DAC to output 10 bits. Of course, it’s too late to change microcontrollers, and...
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Dave Van Ess
