Phase-controlled track circuit receiver

Details Phase-controlled track circuit receiver Phase-controlled track circuit receiver

B - Operations, Transporting

61

L

346/20

B61L 27/04 (2006.01) B61L 1/18 (2006.01)

Patent

CA 1076241

A. C. Knight - 1 PHASE-CONTROLLED TRACK CIRCUIT RECEIVER Abstract of the Disclosure A track circuit receiver with a synchronous detector is disclosed wherein the phase of the reference voltage is caused to automatically follow that of the input voltage, so that there can be no reduction in output signal level as a result of phase differences between input voltage and reference voltage. Fail-safe operation is achieved by inverting the phase of the reference voltage and monitoring the rate of phase change at the output. The track circuit receiver of the present invention additionally utilizes simplified circuitry to achieve the foregoing. - 1 -

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