[ARC5] LC network to convert logic to sine

[Bruce Long]

I agree completely with you Mike.  I design filters from normalized tables all the time.  It is quite easy and I have never understood why filter design from normalized tables has not completely displaced the old fashion filter design based on image parameter theory in the amateur literature.    For logic gate to sine wave conversion networks, I have a method that is even easier than the use of normalized filter design tables.  There is also a gotcha in the selection of which filter configuration to use which is not widely understood.
All will be revealed when I finish my little write up





On Saturday, November 23, 2013 12:22 PM, Mike Feher <n4fs at eozinc.com> wrote:
 
I myself prefer to use the table of normalized filter element values. Have
been using them for over 45 years. I still do if I need a special filter. I
also prefer to use the tables for elliptical (Cauer) filters, while they
have poor phase response characteristics, their sharp roll off and easy tune
up does make them my favorites. Simple filters can be cheaply obtained from
Mini Circuits as well, often for a few bucks on eBay. 73 - Mike 

Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960 



-----Original Message-----
From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On
Behalf Of Bruce Long
Sent: Saturday, November 23, 2013 11:46 AM
To: ARC 5
Subject: [ARC5] LC network to convert logic to sine

I have received emails indicating interest in this topic from a number of
you.  I tried to compose a quick "how to do" but decided it really needs a
more careful writing effort.  My intention is to write something more than a
recipe so you can alter the design technique to get the best fit for your
needs.  I will be working on this on a spare time basis.   Got about 1/4
already written.   Actually I have a draft lose somewhere on a long disused
laptop.   problem is I don't remember which laptop.  Please feel free to
nag.   I am grateful for the interest.   Bruce   KJ3Z
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