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Amplifier Circuits:  Logarithmic Page 1
Amplifier -- Main Page          Math Functions -- Main Page
Logarithmic Amplifiers:  #-B        C-L       M-R        S-Z

Last Updated on: Wednesday, June 02, 2021 01:44 PM

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

Math Utility Routines -  Microchip Application Note Published 26-Aug-97  …

 

Mathcad Functions Perform Log Interpolation -  10/30/03  EDN Design Idea   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 … [by James Bach, Delphi Delco Electronics Systems, Kokomo, IN]

 

Microcontroller drives logarithmic/linear dot/bar 20-LED display -  01/18/07  EDN Design Idea   Do-it-yourself analog-to-LM3914 display driver offers user programmability… [by Dhananjay V Gadre and Anurag Chugh, Netaji Subhas Institute of Technology, New Delhi, India]

Mixed Signal Algorithm Tests Transducers -  04/24/97 EDN Design Idea   A simple test procedure (Reference 1) allows you to measure damping coefficient beta in electromechanical transducers, such as speakers, microphones, and seismic geophones. The method is based on stimulating the transducer with a dc step current, IS, and then separately integrating the positive and negative half-waves of the transducer's terminal voltage, V (t) , after removing the step current.… [by Alex Belousov, Rego Park, NY]

 

Model fixed-point DSP arithmetic in C -  03/18/99 EDN Design Idea (contains several designs, scroll to find this one)   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… [by Roger Maher, SSL Ltd, Dublin, Ireland]

 

Motor-Drive Algorithm Saves Space and Cycle -  02/17/94 EDN Design Idea   The algorithm embodied in the second subroutine in Listing 1generates the excitation sequence for most permanent-magnet and hybrid stepper motors.This subroutine is smaller than subroutines that spring from other algorithms… [by Jose A P Machado da Silva, University of Porto, Porto, Portugal]

 

Numerical Integration Techniques TC7109 -  Microchip Application Note Published 12-Nov-02  …

 

PIC µC implements CRC-16 algorithm -  02/18/99 EDN Design Idea   (Collection of Design Ideas, scroll to find this one)  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… [by Lon Glastner, Solutions Cubed, Chilo, CA]

 

Precision AC Peak Detector -  This unique circuit uses a very inexpensive voltage comparator to form a peak detector. The DC voltage produced tracks the positive peak of the input signal.  It works from about ten millivolts to about 10 volts peak to peak.  The maximum frequency is about[. . . Circuit by Dave Johnson P.E.,  02/11/02]

 

Primer on binary arithmetic rounding -  01/21/99 EDN Design Idea   (Page includes several designs.Scroll to find this one)As digital communications and data compression/decompression proliferate, signal-processing functions grow in importance. Whether you’re dealing with hard-wired logic or pro… [by Tom Balph, Motorola SPS, Tempe, AZ]

 

Routine yields fast bit reversing for DSP algorithms -  09/13/01  EDN Design Idea   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 dimens… [by Mohammed Aziz, University of Leeds, UK]

 

Logarithmic Amplifiers:  #-B        C-L       M-R        S-Z


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