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|12/10/1998 1:05 PM|
||Panasonic BBD Spec sheets|
The data for all of the Panasonic/Matsushita BBD chips can be downloaded as pdf files from http://www.mec.panasonic.co.jp . Select "english" (unless you can read Japanese), then select "semiconductor" and then "catalog". This gets you to "BBD's for Audio".
|12/11/1998 7:41 AM|
Thanks for the tip Mike. I've been searching for this stuff for ages, and never lucked into the right spot.
Visitors to that site will also note the data sheet for the MN3011, the heart of the legendary A/DA-STD-1 (that stands for Stereo Tapped Delay, buddy, NOT sexually transmitted disease).
The MN3011 is a 3000-stage+ BBD with assorted "taps" in the sequence so that delays of multiple length can be combined at the output mixer stage. Naturally, the intended use was for analog reverberation (rather than just discrete echoes). A/DA came up with a clever idea and used it for generating multiple concurrent flange/chorus FX, with the output from each of the 6 taps assignable to the left or right channel (or mono). Even 10 seconds of shallow thinking will leave you with your eyes glazed over by a universe of possibilities for FX generation and design.
Unfortunately, the chip costs a bundle (about $50US) and is not widely available.
While sifting through the site, however, I found another chip numbered the MN3214. This is one of their 5-volt series of BBD chips (just like the MN3207 is). Although it does not have as many stages as the MN3011 (<2000), it too has multiple taps (5), and is intended for analog reverberation. It also uses the same MN3101 or 3102 clock chip as the rest of the MN3xxx series.
Chances are that this chip provides every bit as much flexibility in design as the MN3011, and is a good deal cheaper. I would expect that availability would be no worse than the 3011, and possibly better. The short delay length inherent in the chip precludes use for longer echoes, but the slapback, chorus, double-tracking, and flanging possibilities are immense.
Happy exploring, and thanks again, Mike.
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|12/14/1998 12:40 AM|
I have been on the Panasonic site many times to se if these spec's was there. But now they are!
Thanks for the tip !!
|12/15/1998 8:55 AM|
Thanks for the Enlightenment Mike I. -----------It's Quite perplexing without those Data Sheets. The MN3xxx Series have some interesting qualities in there designs. I wonder if anyone has any circuit schematics for there use in musical effects of any type. That are readily accessible on the WEB. SURF's UP!
|12/22/1998 3:29 AM|
I have visited the Panasonic site to se if I could find the data on the MN3002 used in the well known BOSS CE-1.
The only thing I coudl find was, that this chip is out of production. Does any of you guru'es out there have any information on this chip?
How many buckets?
Thanks in advance, Preben
|12/22/1998 12:01 PM|
Not I, Preben Hansen,
But if it is a Panasonic I.C.. Then they should have the inquired information you need. Perhaps E-Mailing or sending them a hard copy request. Might produce some results.
Across the Oceans there is no boundaries as you look through the optic eye.
|12/22/1998 2:06 PM|
1) The MN3002 has 512 stages.
2) The relationship between time delay and clock frequency is given by:
td = N/(2*fcp)
td = delay time
N = number of stages
fcp = clock pulse frequency
The recommended clock frequency is between 10kHz to 200kHz. The MN3002 has 512 stages, so the available delay time is between 1.28 and 25.6 mS.
3) Digi-Key has a reprint of the Panasonic BBD Series data book. It costs about $3.50 and has data on all of the MN3000 and MN3200 series bucket-brigade devices. I got my copy over four years ago, but I think they still have it.
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