> John Popelish wrote:
 
Hi John,
 
    You might take a look at:-
 
    Op Amp Selection Guide for Optimum Noise  Performance
_http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1154,C1009,C1021,P2
440,D6539_ 
(http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1154,C1009,C1021,P2440,D6539) 
 
     See also _www.linear.com_ (http://www.linear.com/)  AN87 pp87-89 BRIDGE 
MEASURES  SMALL CAPACITANCE
IN PRESENCE OF LARGE STRAYS by Jeff Witt. It should work  fine with 
seismometer capacitor plates, but will need a low pass output filter  added.
 
    Regards,
 
    Chris Chapman





> John Popelish wrote:
 
Hi John,
 
    You might take a look at:-
 
    Op Amp Selection Guide for Optimum Noise=20
Performance
http://www.linear.com/pc/downloadDocument.do?navId=3DH=
0,C1,C1154,C1009,C1021,P2440,D6539
 
     See also www.linear.com AN87 pp87-89 BRIDGE MEASU=
RES=20
SMALL CAPACITANCE
IN PRESENCE OF LARGE STRAYS by Jeff Witt. It should wor=
k=20
fine with seismometer capacitor plates, but will need a low pass output filt=
er=20
added.
 
    Regards,
 
    Chris Chapman