| 摘要 |
A variable impedance is comprised of a stationary base having a surface which is partially coated with a conductive material to form a first element of the variable impedance. A slidable base is mounted for longitudinal movement on the stationary base. The slidable base includes conductive biasing members to bias a second element of the variable impedance carried thereby, to engage the first element on the stationary base. One of the elements is comprised of suitable impedance material for the variable impedance range desired and includes an electrically conductive top surface. The slidable base includes an electrically conductive portion to form a sliding electrical contact with a conductive electrode on the stationary base so that the impedance may be varied by moving the slidable base longitudinally on the stationary base.
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