Phase interpolator

Details Phase interpolator Phase interpolator

2009-11-24

2011-10-11

Cox, Cassandra (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Phase shift by less than period of input

C327S237000

Reexamination Certificate

active

08035437

ABSTRACT:
A phase interpolator receiving a first signal having an oscillation frequency Fin and providing a second signal having said oscillation frequency and having a phase shift Δφ with respect to the first signal which depends on a third signal. The interpolator includes a variable phase-shifter receiving the first signal and providing the second signal, the phase-shifter circuit includes an oscillator having a variable natural frequency Fo controlled by a fourth signal; a phase comparator capable of receiving the first and second signals and of providing a fifth signal representative of said phase shift; and a unit capable of providing the fourth signal which depends on the third and fifth signals.

REFERENCES:
patent: 5999793 (1999-12-01), Ben-Efraim et al.
patent: 2004/0057546 (2004-03-01), Badets et al.
patent: 2010/0134158 (2010-06-01), Pignol et al.
patent: 2 914 807 (2008-10-01), None
Dally W.J. et al.,A second-Order Semidigital Clock Recovery circuit Based on Injection Locking, IEEE Journal of Solid-State Circuits, IEEE Service Center, Piscataway, NJ, vol. 38, No. 12, Dec. 1, 2003, pp. 2101-2110, XP011104260.
Preliminary Search Report for French Patent Application FR 08/58112 dated Jun. 24, 2009.

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