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arrangement for filtering of the phasenzitterns due to remove positive stopfbits and application for filtering of the phasenzitterns for removing positive and negative stopfbits digital pulse sequence
arrangement for filtering of the phasenzitterns due to remove positive stopfbits and application for filtering of the phasenzitterns for removing positive and negative stopfbits digital pulse sequence
Device for filtering positive de-stuffing jitter of a digital train, device including a phase-locked loop (15, 16, 17) making it possible to slave the rate of a signal representative of the rate of reading a buffer memory (12) in which the said digital train is written, de-stuffed, at the rate of a signal representing the rate of writing in this buffer memory, while carrying out low-pass-type filtering, device characterised in that it further includes means (1) called first means for determining the actual level of stuffing of the said digital train and to deduce therefrom the difference, called difference stuffing level, Td, between this actual level and a justification level known as nominal level, Tn, of this digital train, and means (2, 4, 5, 6, 7) called second means for: - systematically suppressing the phase jumps, due to the positive de-stuffing, of the said signal representative of the rate of writing of the buffer memory, - regenerating phase jumps of this signal, corresponding in number to the said nominal stuffing level, - regenerating phase jumps of this signal, corresponding in number to the said difference stuffing level, and with smoothing of these phase jumps. IMAGE
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