From: Mike Monett
X-Mailer: Mozilla 2.02 (Win16; I)
Subject: Re: Binary Sampler
Date: Sat, 18 Jan 2003 03:49:16 -0500
NNTP-Posting-Date: Sat, 18 Jan 2003 03:48:39 EST
Organization: Bell Sympatico
John Larkin wrote:
> I'll call it whatever I want to; I choose to call it a 'slideback
> sampler' to give credit to the people who published it before I saw
> it: the GE book, the National appnote, and PC Instruments, who
> commercialized it.
John, I looked up the references you made in a.b.s.e and found the
samplers made by PC Instruments are still on the market, but the 300 MHz
version is a standard 8-bit 12.5 Msample/sec digitizer with equivalent
Can you verify this is the one you were referring to?
> And I'm *still* sorry I told you about it.
Well, I hope to mend things. I never made a secret of it. I gave you full
credit for the key concept in the original document on my web site. It
stayed there until I moved to Ottawa, and started to rewrite the whole
thing and break it into separate files.
Then I discovered it is really a Delta Modulator, except it is
undersampled instead of oversampled. So what am I going to do. Say I got
this really neat idea from John Larkin, but it was really invented by a
frenchman 50 years ago? That wouldn't make much sense to other readers,
who probably don't follow these newsgroups.
So I changed the credits to reflect the original inventors, and the
follow-on work. You are not the only one who got delisted. Win Hill,
Gerry Schneider, and others who made significant contributions to the
whole thread do not appear in the current version.
I am really sorry that this had the effect it did, but I'd be happy to
send you all the original documents if you like, and you can verify for
yourself that your name appeared first in the list.
BTW, Philips is in the process of throwing out old documents. I just
happen to meet a secretary in the group responsible, and asked her to see
if she could find the article listed on my web site by J. F. Schouten, F.
de Jager, and J. A. Greefkes titled "Delta modulation, a new modulation
system for telecommunication," Philips Technical Review, vol. 13, no. 9,
pp. 257-266, March 1952.
She found it! It was due to be destroyed, and I may have one of the few
surviving copies. It is in German, of course, but the binary sampler sits
there in plain view:)