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Simple Algorithm Nulls DC Offsets in DSP: 09/15/94 EDN
Design Ideas / (Schematic / circuit added 10/05) |
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Simple Algorithm Transforms Filter Coefficients: 01/21/99 EDN-Design
Ideas / (Schematic / circuit added 10/05) To synthesize infinite-impulse-response (IIR)-filter functions, expressed as H(z), you commonly use
analog prototype-filter functions, expressed as H(s), using the bilinear-z transform. This operation entails some algebraic complexity in
calculating the filter coefficients. The simple algorithm shown here transforms the prototype-filter coefficients (W0, W1, W2) to the IIR
digital-filter coefficients (U0, U1, U2). These coefficients transform from the s (analog) domain to the z (digital) domain.... |
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Single Stage Gives Logarithmic Gain Steps : 03/03/94
EDN-Design Ideas / (Electronic Schematic / circuit added 4/02) - By placing a variable component in the positive feedback loop of an op amp;
you can vary the gain of the stage logarithmically with respect to a linear resistance or conductance |
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Software Snippet Provides Improved Subset Sum Algorithm :
09/25/03 EDN-Design Ideas / (Electronic circuit added 10/03) The subset-sum problem is one of the most frequently occurring NP
(nondeterministic, polynomial-time)-complete) problems. It asks whether a subset of numbers in a set of positive integers adds up exactly to a
given value. A relaxed version of the problem tries to identify a subset of numbers that adds up to a maximum value no greater than a given
value.... |
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State of the Art Characterization of Optical Components for Dwdm Applications: Aligent Application Note (app note added 2/06) |
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Theory and Applications of Logarithmic Amplifiers :
National Semiconductor Application Note 24-Feb-1999 (app note added 4/02) |
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Using the ADXL202/ADXL210 with the Parallax BASIC Stamp Module® to Speed Algorithm
Development: AN-596 - Analog Devices Application Notes (app note added 6/06) |
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Versatile Power Supply Load uses Light Bulbs: 02/07/02
EDN Design Ideas / (added 1/05) Improvising loads for bench-testing and designing power supplies is often a frustrating and
sometimes hazardous experience. When you push large power resistors to their limit, they tend to burn benches and melt solder connections.
Many electronic loads are on the market but are usually expensive and of laboratory-type precision and often represent overkill for the
average designer. ... |
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White LED Driver provides 64 step logarithmic dimming:
06/10/04 EDN Design Ideas / (added 1/05) The circuit in this Design Idea is designed for portable-power applications that
require white LEDs with adjustable, logarithmic dimming levels. The circuit drives as many as four white LEDs from a 3.3V source. |
