DLL-based multiphase clock generator

Details DLL-based multiphase clock generator DLL-based multiphase clock generator

2009-02-25

2011-11-15

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S158000

Reexamination Certificate

active

08058913

ABSTRACT:
The present invention relates to a delay-locked loop-based multiphase clock generator that generates a plurality of multiphase clocks from an input clock signal using a voltage controlled delay line including a plurality of dummy cells. The delay-locked loop-based multiphase clock generator includes an anti-harmonic lock circuit that receives an input clock and a reference clock of multiple clocks, determines whether a pulse signal derived from the input clock is within a normal locking range of the reference clock, and outputs a compulsory control signal to compulsorily control an output signal of a phase detector if it is determined that the pulse signal is not within the normal locking range.

REFERENCES:
patent: 6784707 (2004-08-01), Kim et al.
patent: 7084676 (2006-08-01), Harron et al.
patent: 2009/0167387 (2009-07-01), Kim

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