Some kind of cheap-o comparison bridge? I can't guess as to the
specifics though... I assume using a small number of passive
components... perhaps wirewound instead of soldered, to avoid joint
failure @ extreme temps... am I anywhere in the ballpark?<br><br><div><span class="gmail_quote">On 10/8/05, <b class="gmail_sendername">Paul Schreiber</b> <<a href="mailto:synth1@airmail.net">synth1@airmail.net</a>> wrote:
</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">About 10 years ago, I had to design a capacitance meter that could resolve 10fF<br>(10 femtofarads) on a scale of 0 to 100pf. For $25. Working outside at -40C to
<br>+100C.<br><br>Any guesses how it was done?<br><br>Paul S.<br><br></blockquote></div><br>