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Last Updated on: Saturday, August 30, 2014 10:27 AM

 

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:
Allpass Network Shifts Signals 90° -  04/27/95 EDN-Design Ideas  Unlike lowpass, bandpass, and other magnitude-altering filters, allpass filters can shift the phase of a signal without affecting its amplitude. For a first-order allpass circuit, the transfer function is…. [Design Idea by Gary Sellani, Maxim Integrated Products, Sunnyvale, CA]
Digital Delay Unit For Surround Sound -  The Mitsubishi M65830 Digital Delay IC has been discontinued (for reasons beyond my comprehension), and so far a suitable replacement device has not been found.  This means (of course) that you will be unable to build this delay circuit. I have left the project in place as reference, and the overall connection schematic is still valid if (when?) a replacement for the M65830 is located. The project will be updated at that time. In the meantime, just ignore the delay circuit.... (schematic / Circuit design added 9/02)
Quadraphonic Amplifier -  This is a four channel amplifier ideally suited for use with quadraphonic equipment such as a Sound Blaster Live card. (added 4/02)

Simple Surround Processor -  Simple Surround Processor.  This is built with only conventional parts, and digital delay block, too. So it is very easy to build.  (added 6/06)
Simple Surround Sound Decoder -  This surround-sound decoder is based on the "Hafler" principle, first discovered by David Hafler sometime in the early 1970s. The original idea was to connect a pair of speakers as shown in Figure 1, for use as the rear speakers in the surround setup....(electronic design added 6/07)
Surround Effect -  ….(design added 03/08)
Surround Processor -  Simple Surround Processor.  This is built with only conventional parts, and digital delay block, too. So it is very easy to build.  (added 6/06)
 
 
 

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