I haven't had time to get to the electronics of the VBB. I just changed jobs in early December and just getting settled in. I will take a look at my schematics and get back to you. barry lotz wrote: > Hi Rex > I was reviewing your drawings and had a question about the bridge and > subsequent circuit. STM's drawing shows the ref oscillator going into an > inverting configured amp with gain of 100, followed by an inverting amp with > gain of one. They both go into different pins of the demodulator. As I read > your drawing , you have two inverting amps with gain of 100 connected to > the bridge ends. Is this equivalent? I don't know. It seems in your circuit > that the two amps would have the same sign where in STM's circuit they are > of opposite sign. Karl's lvdt demodulator( which I currently use) is more > like STM's in that one uses the switch to selectively choose one signal or > the other depending on sign ( a rectifier). > Regards > Barry > > _____________________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email listserver@.............. with the body of the > message: leave PSN-L -- Rex Klopfenstein, Jr. Bowling Green, OH rklopfen@......... http://www.wcnet.org/~rklopfen _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>