Pulse or digital communications – Testing – Phase error or phase jitter
Patent
1997-09-10
1999-05-11
Vo, Don N.
Pulse or digital communications
Testing
Phase error or phase jitter
375375, 327 7, 370518, H04B3/46
Patent
active
059036052
ABSTRACT:
A jitter detection method and apparatus for informing an adaptive equalizer that the correlated jitter of transmitted data exceeds a predetermined jitter value. In one embodiment of the present invention, a jitter detection circuit receives transmitted data symbol pulses and clock signal pulses. The jitter detection circuit then compares a specified edge (e.g., the falling edge) of an incoming data pulse with the corresponding specified edge (e.g., the falling edge) of a clock signal pulse to determine if an original phase error between the incoming data pulse and the clock pulse exists. Similarly, the jitter detection circuit detect subsequent phase errors between subsequent data pulses and subsequent clock pulses. The original detected phase error will then be compared against subsequently detected phase errors. Based on this comparison of the phase errors, the jitter detection circuit then informs the adaptive equalizer of the degree of phase and amplitude compensation that it needs to provide.
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Intel Corporation
Vo Don N.
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