Re-inventing (?) the VC envelope ?

[Paul Schreiber]

The CEM chips were all designed using Interdesign arrays. Doug Curtis was
Interdesign's cheif
analog applications engineer.

The company is *LONG* gone!!

Paul Schreiber

-----Original Message-----
From: Steve Varner <varner at k-online.com>
To: synth-diy <synth-diy at mailhost.bpa.nl>
Date: Sunday, January 24, 1999 11:28 AM
Subject: Re: Re-inventing (?) the VC envelope ?


>Wait, I missed something here...
>Did JH mention Interdesign arrays? Also, if the NPN pair is good, can't the
>NPN pair be used and the PNPs left unconnected? Or are they all connected
in
>the chip? Lastly, are these chips defunct?
>
>SV
>
>
>------------------------------
>Paul Schreiber wrote:
>
>> The cat's out of the bag!!!
>>
>> Yes, JH hit it on the head (as we say!): the Interdesign arrays had
*LOTS*
>> of
>> great matched NPNs (<2mv Vbe matching) but crummy lateral PNPs.
>>
>> Paul Schreiber
>
>
>
>