Circuit Cellar Ink 61
August 1995

Table of Contents


Ken Davidson

Editor's INK

Digital Sound Processing


Reader's INK

Letters to the Editor


Harv Weiner

New Product News


Do-While Jones

Digital Filter Alchemy

Turning Circuits into Code

Do-While assumes you've picked your microprocessor and hardware circuitry. He just wants to help you with the digital-filtering techniques. He offers closeups on actual digital-filter implementation.


Sebastien Roy

PDF Speech Compression Techniques and the CDV-1 Digital Voice Box

None of the methods for storing digitally recorded speech met project needs. After summarizing verious methods, Sebastien refines the companded differential PCM method, a solution which fit the bill.


Matt Park

Real-Time Digital Signal Processing with a PC and Sound Card

A Windows-compatible sound card and a 486 PC are all you need to experiment with real-time digital signal processing. Here, Matt introduces us to Digitize, a real-time software DSP alternative.



Eric Ambrosino

PC-based Equalizer

Multimedia on the PC has given new dimensions to the importance of PC sound. In this article, Eric presents an equalizer with a graphical interface comparable to what you would find on a home stereo.

Download: PCEQ.ZIP


Paul Rubinfeld

Digital's Alpha 21164: Performance Drives Design Choices

With the Alpha chip, Digital blew open the desktop computing world. In this article, Paul specifically looks at how Alpha achieves its high performance. As with much of life, it appears that cache is the secret.


Ed Nisley

PDF Firmware Furnace

Journey to the Protected Land: Of Characters and Keystrokes

Continuing last month's keyboard discussion, Ed set out to convert Scan Code Set 3 codes into those expected by the real-mode BIOS. He also looks at how the numerous shift keys are handled.


Jeff Bachiochi

From the Bench

Decontaminating the Atmosphere

FCC testing may strike fear in the hearts of engineers, but going in armed with the knowledge that you've done your own pretesting can be a comfort. Jeff checks out some inexpensive EMI probes that can help.


Tom Cantrell

Silicon Update


A PAL is a PAL, right? Not these days. Programmable logic has taken off, and with it comes many of the same dilemmas faced when trying to select a microprocessor. Tom tries to make some sense of the confusion.


John Dybowski

Embedded Techniques

Power Managment with the DS87C530: Part 1: The Hardware

Instead of regulating power by turning the micro on and off, the DS87C530 can drop into a virtual zero-power state by shunting its minimal activities to internal oscillators. Even its real-time clock can go into an almost no-power mode.


Advertiser's Index


Ken Davidson

ConnecTime -- Excerpts from the Circuit Cellar BBS


Steve Ciarcia

Steve's Own INK

Under the Covers

FTP Directory for INK 61
Follow this link to order a copy of INK 61

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