Primer on Binary Arithmetic Rounding:  01/21/99 EDN-Design Ideas  / (added 2/06)   As digital communications and data compression/decompression proliferate, signal-processing functions grow in importance. Whether you’re dealing with hard-wired logic or programmable engines, an understanding of binary-arithmetic rounding is important in getting correct and consistent results. Before we discuss rounding, consider a binary number (Figure 1). At first glance, rounding seems a simple matter. However, several variations...

Realizing Trigonometric Functions with the Multifunction Converter LH0094:  National Semiconductor - Application Note  (app note added 2/06)

Reference stabilizes exponential Current:  10/25/01 EDN Design Ideas  /  (added 1/05)  In an antilog converter, the difference between the base voltages of two transistors sets the ratio of their collector currents: The use of matched transistors balances the first-order temperature coefficient but leaves a temperature-dependent gain term, q/kT. Classic antilog circuits use a thermistor in the drive circuitry to correct this temperature dependency. ...

Resistance calculator yields precise values:  08/03/95 EDN-Design Ideas / (added 2/06)   

Signed Integer Arithmetic on the HPC:  National Semiconductor - Application Note  (app note added 2/06)

Theory and Applications of Logarithmic Amplifiers:  National Semiconductor - Application Note  (app note added 2/06)

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. ...

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.