Apparatus for detecting and discriminating phase jumps in a...

Details Apparatus for detecting and discriminating phase jumps in a... Apparatus for detecting and discriminating phase jumps in a...

H - Electricity

04

M

379/64

H04M 3/18 (2006.01) H04L 27/233 (2006.01) H04L 27/18 (2006.01)

Patent

CA 1268276

ABSTRACT: Apparatus for detecting and discriminating phase jumps in a periodic signal and its application to a telephone tone signal with phase inversions. The apparatus for detecting and discriminating phase jumps in a periodic signal comprises, arranged in cascade between an input terminal (1) and an output terminal (2), a frequency converter (3) transforming the frequency spectrum of the input signal e(t) con- taining a line at the frequency fe in a continuous band spectrum whose frequency is centred around fe, an inter- rupter (4), a resonator (5) having a resonant frequency fO near fe and a phasemeter (6) having detection and discrimination means. The ensemble of these elements (3-6) is controlled by a sequencer (7) which, at each period .alpha. such that .alpha. = t1 + t2, allows the phase detec- tion and the discrimination of each phase jump of a predetermined value .DELTA.?e which may be contained in the input signal at the frequency fe.

535020

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