| 摘要 |
A servoed transducer system includes an AC bridge and detector circuit in which differentially variable, linear sensing impedances are connected in a basic AC bridge configuration using solely linear impedances. Movement of a pivoted seismic mass varies the impedances of the differential sensing impedances, unbalancing the AC bridge and generating a pair of cyclic signals coupled to a detector circuit which includes a pair of nonlinear rectifiers connected through resistive means to a summing junction. An integrator connected to the summing junction produces an error voltage which is amplified in a servo amplifier and used to power a torque coil which generates a magnetic field to rebalance the seismic mass.
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