Subject: | |
From: | |
Reply To: | TechNet Mail Forum. |
Date: | Mon, 3 Nov 1997 15:39:21 -0500 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
Can anyone out there help me with the subject of using guard rings
around op amp inputs to minimize leakage at the high impedance nodes?
I will be using an FR-4 PCB, multilayer, PTH technology. From what
I've read, it is suggested that the guard rings be placed on every
layer. This begs the question: "How do I then connect traces to the
node being guarded?". Also, any traces that do connect to the guarded
node and then run outside of the ring are now subject to the same
leakage that the original node was.
Any help would be appreciated.
Max.P.Harris
Hardware Design Engineer
Lockheed Martin Canada, Inc.
##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe: SUBSCRIBE TECHNET <your full name>
To unsubscribe: SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311
##############################################################
|
|
|