18 Dec
2007
18 Dec
'07
2:28 p.m.
Date: Tue, 18 Dec 2007 10:03:34 +0000
From: Ethan Dicks <ethan.dicks at usap.gov>
Subject: Re: Shift Registers as Delay Lines (was Delay lines in TV
sets)
On Mon, Dec 17, 2007 at 06:52:59PM -0500, Allison wrote:
> MOS shift registers of lengths greater than a few
bits are very late
> 60s (after 67 or so). By early 70s parts 1024 long ere not uncommon.
I think I have a couple of old SAD1024 MOS shift
registers from when I
was collecting deeply discounted items from the local Radio Shack
"Manager's Table" as a kid.
I had thought one day to make the audio echo/delay
circuit I think I
saw in an old Forrest Mims circuit book, but a solid-state acoustic
delay line emulator sounds like a much cooler place to put them.
-ethan
___________
Sounds like our shopping habits were the same in those golden days
at the 'shack ;-); I've still got a couple waiting for me to get a round tuit
(the data sheet also has the bucket brigade audio delay schematic).
As a digital delay line I guess you could even use it word-wise since it's
analog; you'd need some pretty fast DAC/ADCs though.
mike