Resonant sensor using a phase locked loop detector

Details Resonant sensor using a phase locked loop detector Resonant sensor using a phase locked loop detector

1976-01-22

1977-05-03

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

324161, 328149, 307282, H03D 1300, H03K 520

Patent

active

040216810

ABSTRACT:
A speed sensor circuit for providing a speed signal representative of the speed of a vehicle comprises a resonant tank circuit whose resonant frequency is modulated in accordance with the speed of the vehicle and a phase locked loop detector circuit which locks onto the frequency of the resonant tank circuit and provides a demodulated output signal representative of the vehicle speed.

REFERENCES:
patent: 3286191 (1966-11-01), Cornwell
patent: 3614615 (1971-10-01), Cass
patent: 3820024 (1974-06-01), Wise et al.

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