[ARC5] LC network to convert logic to sine

[Ian Wilson]

The AADE (free) filter design program is very handy for passive filters,
xtal filters, etc.

73, ian K3IMW


On Sat, Nov 23, 2013 at 10:01 AM, Bruce Long <coolbrucelong at yahoo.com>wrote:

> 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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