Systems and methods for correcting gain error due to...

Details Systems and methods for correcting gain error due to... Systems and methods for correcting gain error due to...

2007-02-06

2007-02-06

Ghebretinsae, Temesghen (Department: 2611)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

Reexamination Certificate

active

10328298

ABSTRACT:
In one embodiment, the present invention is directed to a system for processing a data stream. The system comprises: a voltage controlled oscillator (VCO) that generates a VCO signal in response to a tuning signal; a phase detector that generates an error signal that is indicative of a phase difference between a data signal and the VCO signal; a first filter that filters a reference signal that is indicative of an occurrence of a data transition; a second filter that filters the error signal, wherein the first filter and second filter are low-pass filters that possess a bandwidth that approximately equals one half of the reciprocal of: a unit interval multiplied by a maximum run length; and a divider circuit that divides the filtered error signal by the filtered reference signal.

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Armstrong, Edwin H, “A Method of Reducing Disturbances in Radio Signaling by a System of Frequency Modulation”, Proc. IRE, vol. 24, No. 5, May 1936, p. 689ff.
Jaffe, D.L., “Armstrong's Frequency Modulator”, Proc. IRE, vol. 26, No. 4, Apr. 1938, p. 475 481.

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