TRANSDUCER CONTROLLED VARIABLE FREQUENCY WIEN-BRIDGE OSCILLATOR
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Abstract
THE FREQUENCY SELECTIVE BRIDGE OF A STANDARD WIENBRIDGE OSCILLATOR IS PROVIDED WITH AN ADDITIONAL PHASE SHIFTING NETWORK COMPRISING A CAPACITOR AND A LINEARIZED TRANSDUCER. THE TRANSDUCER EXHIBITS IMPEDANCE CHANGES RESPONSIVE TO PHYSICAL VARIATIONS OF A FUNCTION BEING MEASURED, AND THE OVERALL CIRCUIT DIRECTLY CONVERTS SUCH TRANSDUCER
IMPEDANCE VARIATIONS INTO A LINEAR DIGITAL FUNCTION IN A COMPUTER COMPATIBLE FORMAT WITHOUT THE USE OF A VOLTAGE DRIVEN ANALOG-TO-DIGITAL CONVERTER MODULE.
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