From: rcrowley@xp7rt.net   
      
   "Randy Yates" wrote ...   
   > Kevin McMurtrie writes:   
   >> The output of that follower also drives a shield on the input wire.   
   >   
   > "that" follower? Which one? Are you talking about shielded, twisted   
   > pair cable?   
   >   
   >> The result is a virtually perfect cable with no capacitance and no   
   >> insulation losses.  (It only works as long as the electrical   
   >> wavelength of the input is much longer than the wire, as with audio.)   
   >   
   > Without the previous clarifications, it's hard for me to grok this   
   > last statement, but it sounds like an interesting result.   
      
   He appears to be talking about the technique of using a "driven guard"   
   http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=00706021   
   I hold a patent for using that technique to probe very low currents   
   on semiconductor wafers.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)