Patent ID: 7671670

Claim:
A device for demodulating an input signal containing information being conveyed by phase modulation of a carrier wave, wherein said signal being generated by means of a transmitter controlling a phase variation in said carrier wave, for each symbol comprising N cycles, N being an integer strictly greater than 1, the phase variation stretching on the receiver side over n cycles, n being an integer greater than 1 and less than N, said device comprising: means for generating a measurement pulse, for each symbol received, said means capable of: generating a first edge of the measurement pulse corresponding to the symbol considered after a first constant duration from the moment the symbol considered starts, the first duration being less than the minimum duration of the n first cycles of a symbol of the input signal; and generating a second edge of the measurement pulse corresponding to the symbol considered after a second duration, which may be zero, following the start of the (n+1)th cycle of the symbol considered; and conversion means generating an output signal with a voltage varying as a function of the duration of the pulses produced.