I'm looking for a way, hopefully not too complicated, to gate signals on an= d off without inducing more than maybe 100nV of disturbance. The signals may be at ground, or may be riding on a volt or two. "off" means more than 30dB reduction. Any ideas? -- David VanHorn Lead Hardware Engineer Backcountry Access, Inc. 2820 Wilderness Pl, Unit H Boulder, CO 80301 USA phone: 303-417-1345 x110 email: david.vanhorn@backcountryaccess.com --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .