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Displacement Transducer

IP.com Disclosure Number: IPCOM000094607D
Original Publication Date: 1965-Mar-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Fant, WJ: AUTHOR

Abstract

An LC resonant circuit 1 having an inductance 2 and capacitors 3 and 4 is connected to base 5 of transistor 6. The energy fed back to tap 7 on circuit 1 from emitter 8 through an inductance 9 is normally just sufficient to sustain oscillation.

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Displacement Transducer

An LC resonant circuit 1 having an inductance 2 and capacitors 3 and 4 is connected to base 5 of transistor 6. The energy fed back to tap 7 on circuit 1 from emitter 8 through an inductance 9 is normally just sufficient to sustain oscillation.

Movement of conductive vane 10 farther from inductance 9 increases the signal voltage drop across inductance 9. This results in decreasing the feedback voltage below the threshold necessary to sustain oscillations.

The output voltage at terminal 11 displays a change when the circuit goes out of oscillation. Such indicates the distance that vane 10 has moved from a reference position.

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