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Biasing transistors and ICs?

8/30/1996 3:12 PM
Erik Wood
Biasing transistors and ICs?
Hi there.  
I need to learn the ins and outs of biasing transistors and linear as well as logic ICs, but I do not know exactly where to start. I have a fair grasp of how these semiconductors work and how to apply them, but biasing still eludes me. Especially Logic ICs. I am interested in building a Logic based guitar dostortion box, and I understand that there is a region between the low and high states of a CMOS logic chip which can be made to amplify linear signals. How is this accomplished? How does one learn of the range of this region? I assume that it is information provided by the manufaturer, but it is nowhere in my Mouser or Digikey catalogs. Is there a book or reference source where I can learn about the reasons for, benefits of, and techniques for biasing semiconductors of all sorts?  
Thanks in advance.  
8/31/1996 7:14 PM
Christian Landry

OK Erik,  
One thing to remember when studying effects theory. What you are  
dealing with in the effects world is everything one is taught to avoid  
in engineering schools. Enginners who design electronic circuits are  
taught how to get rid of distortion. They are taught that when building  
an amplifier, the ultimate goal is to reproduce the signal as best as  
possible. So, in effects design and theory, one will have a hard time  
finding a book that will explain theory on a design that is not practical.  
I know what you want and I know from over the years of my experimentation  
that effects are learned by hands on failures until you get the right  
formula. Engineers have a basic structure which can be learned from a  
electronics theory book, but, that is only a stepping stone for an  
effects pedal. For me, half the fun is building effects starting with  
the basics and going from there. So, grab a bunch of audio schematics  
and start playing with caps and resistors, and anything conductive. Just  
stay away from voltage larger than 9 volt batteries. Hope this helps.

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