Math Utility Routines:  Microchip Application Note - Published 26-Aug-97   (added 2/06)

Mathcad Functions Perform Log Interpolation:  10/30/03 EDN Design Ideas  /  (added 1/05)  MathCAD provides a number of interpolation and curve-fitting functions, so that, given a set of X-Y data points, you can estimate the Y value for any given X coordinate. Unfortunately, these functions work poorly with data that is to be displayed in a nonlinear (logarithmic) manner. Examples of these functions are: Using the built-in "linterp" function, MathCAD estimates and plots the data (Fig......

MAX1464 Signal-Conditioner, Sensor Compensation Algorithm:  App Note 3649: Maxim IC  (Circuit / schematic design added 6/06)

Mixed Signal Algorithm Tests Transducers:  04/24/97 EDN-Design Ideas  / (added 2/06)   

Model Fixed Point DSP Arithmetic in C:  03/18/99 EDN-Design Ideas / (Schematic / circuit added 10/05) You can run initial high-level simulations of custom numerical algorithms, such as digital filters, using floating-point numbers in an environment such as C or Matlab. Unfortunately, you won't see include fixed-point effects, such as truncation due to limited precision and register overflow, until you use a Hardware Design Language (HDL), such as Verilog or VHDL. However, a technique that models these effects in C—the function "bit_limit" in Listing 1—provides faster execution and better portability than HDLs and allows early exploration of the trade-off between bus width and performance.

Motor Drive Algorithm Saves Space and Cycles:  02/17/94 EDN Design Ideas / (added 2/06)

Numerical Integration Techniques (TC7109):  Microchip Application Note - Published 12-Nov-02   (added 2/06)

PIC µC Implements CRC16 Algorithm:  02/18/99 EDN-Design Ideas / (added 5/03) Detecting errors in serial data can be paramount in completing an embedded-control design. Determining which algorithm to use for detecting serial-communications errors depends on several factors. Ideally, the method should require minimal hardware and little computational power from your processor and still provide high-level protection against undetected data errors. The cyclic redundancy check (CRC) combines all these factors under one umbrella. A multitude of CRC flavors exists, including....

Polarization Dependent Loss Measurements of Passive Optical Components:  Aligent Application Note  (added 2/06)

Primer on Binary Arithmetic Rounding:  01/21/99 EDN-Design Ideas  / (Schematic / circuit added 10/05)  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...

Rapid Prototyping Speeds Development of UMTS W-CDMA Algorithms:  Agilent Application Note   (Circuit / schematic design added 6/06)

Routine yields fast Bit reversing for DSP algorithms:  09/13/01 EDN Design Ideas  /  (added 1/05)  If you need efficient real-time performance in DSP applications, you need an efficient bit-reversing routine. For several FFT programs, data permutation can take 10 to 50% of the computation time, depending on the input-data dimensions and length. The idea behind bit reversing is to shuffle the data by flipping the address bits around the middle of the address length so that if the data l... ...