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Math Function: Logarithmic  Page 3
Math Functions - Main Page -
Logarithmic Math Function:  #-A - ,  C-F - ,   L-O - ,  P-Z   
Last Updated on: Wednesday, June 02, 2021 04:35 AM

Links to electronic circuits, electronic schematics and designs for engineers, hobbyists, students & inventors: -

Linear potentiometer provides nonlinear light intensity control - 28-Apr-05 Issue of EDN  Circuit matches light control to eye’s intensity-response curve....[Design Idea by Stephan Goldstein, Analog Devices, Wilmington, MA; Edited by Brad Thompson]
Log amp uses capacitor-charging law - 10-Jan-02 Issue of EDN  The novel logarithmic amplifier in Figure 1 relies on the exponential charging characteristics of a simple RC circuit. The expression for the time, T, required for a capacitor, C, to reach a voltage (VIN-VK] from 0V, when charged through a resistor, R, with an applied voltage of VIN, is VIN-VK=VIN (1-e-T/RC], where VK is a fixed voltage....[Design Idea by Jayashree Raghuraman and Ajoy Raman, Aeronautical Development Establishment, Bangalore, India]

Log-ratio amplifier has six-decade dynamic range - 27-Nov-03 Issue of EDN  You need optical-power monitoring to guarantee overall system performance in fiber-optic communication systems.....[Design Idea by Reza Moghimi, Analog Devices, San Jose, CA]
Math Utility Routines - Microchip Application Note Published 26-Aug-97  (app note added 2/06)
MathCAD functions perform log interpolation - 30-Oct-03 Issue of EDN  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,....[Design Idea by James Bach, Delphi Delco Electronics Systems, Kokomo, IN]
 
Model fixed-point DSP arithmetic in C - 03/18/99 Issue of EDN  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....Page includes several designs.  Scroll to find this one....[Design Idea by Roger Maher, SSL Ltd, Dublin, Ireland]
Motor Drive Algorithm Saves Space & Cycles - 02/17/94 EDN-Design Ideas....The algorithm embodied in the second subroutine in Listing 1  generates the excitation sequence for most permanent-magnet and hybrid stepper motors.  This subroutine is smaller than subroutines that spring from other algorithms....[Design Idea by Jose A P Machado da Silva, University of Porto, Porto, Portugal]
Nodal Analysis - ....(spice design added 02/09)
Non-Linear DC Analysis - ....(spice design added 02/09)
Numerical Integration Techniques TC7109 - Microchip Application Note Published 12-Nov-02  (app note added 2/06)
Logarithmic Math Function:  #-A - ,  C-F - ,   L-O - ,  P-Z -

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