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Reply To: | TechNet Mail Forum. |
Date: | Tue, 4 Nov 1997 08:23:23 -0500 |
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Neil,
Thanks for the interest. My application is in an interface CCA between
sonar transducers and a data acquisition processor CCA. There are a
variety of opamp circuits on board, including regular inverting and
non-inverting, as well as pseudo-differential circuits.
My question concerning guard rings started off due to a requirement to
minimize offsets, etc.. However, I am now unsure whether the circuit
impedances I am dealing with are really high enough to warrant the use
of guard rings. But, as always happens, my curiosity is piqued. So my
question still stands.
It seems that the question is general enough that the specific
opamp/circuit involved is not that important. Whatever the circuit, it
still remains that you have to connect to a node which is being
guarded on every layer of the PCB. How is this done without breaking
the guard on at least one layer?
Hope you can help,
Max.P.Harris
Hardware Design Engineer
Lockheed Martin Canada, Inc.
______________________________ Reply Separator _________________________________
Subject: Re: [TN] DES: Guard rings
Author: Neil Diamond <[log in to unmask]> at smtp_gway
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