[SI-LIST] : Plane Capacitance

About this list Date view Thread view Subject view Author view

From: Mike Hughes (mike.hughes@analog.com)
Date: Tue Nov 09 1999 - 09:16:21 PST


When using power/ground planes as capacitors for decoupling, decreasing the
distance between them increases the capacitance. Is there any reason why you
should not use the minimum possible spacing? In other words, is it possible to
have too much capacitance? How low can resonance occur? (Disregard, cost and
manufacturing issues.)

What is the effective area for this type of capacitance? If you have 10"x10"
planes with one device in the middle, how much of that 100sq" will help decouple
the device? What if the device is at the edge or corner of the planes?

Thanks
Mike

-- 
================================
Mike Hughes               
Product/Test Engineer      
High Speed Conversion       
Analog Devices, Inc. 

Phone 781-937-2370 Fax 781-937-1011 mailto:mike.hughes@analog.com http://www.analog.com ================================

**** To unsubscribe from si-list: send e-mail to majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE si-list, for more help, put HELP. si-list archives are accessible at http://www.qsl.net/wb6tpu/si-list ****


About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Tue Feb 29 2000 - 11:39:43 PST