Hi gang, I'm working on a few old projects. One is to construct an R-C bridge and make some admittance measurements of small signal BJTs. I plan to use the technique of measuring yin with yout shorted, and yout with yin open. One question I have regards yin: I plan to use standard voltage divider
bias with a bypassed emitter stabilization scheme. Should the two base resistors be decoupled from the active device so that the value of y obtained is only due to the base-emitter characteristics, or should the measurement be made with the two base resistors simply connected to the base as would be done in a functioning amp? In this case, I would presume that the value of y obtained would be of the base-emitter in parallel with the two resistors. Thanks for the insight.
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Bob WB0POQ (P.S.) Anyone looking for a talented engineering tech in the Mpls/St.Paul MN area?? :)