Local coarse delay units

Details Local coarse delay units Local coarse delay units

2009-03-25

2010-12-21

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S159000

Reexamination Certificate

active

07855585

ABSTRACT:
One delay locked loop circuit embodiment includes a delay line system configured to generate a clock output signal by adding a delay line system time delay to a clock reference signal, a phase detector, a shift register, and a control unit. The delay line system includes a coarse delay line to adjust the delay line system time delay by remote coarse-shifting, a phase selector configured to adjust the delay line system time delay by local coarse-shifting output signals from a series of local coarse delay units, and a phase mixer to adjust a particular time delay of the clock output signal by fine-shifting. The phase mixer does not receive the clock reference signal. The phase detector detects a phase difference between the clock reference signal and the clock output signal. The shift register controls the remote coarse-shifting, and the control unit controls the local coarse-shifting, based on the phase difference.

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Applicant's Response dated Dec. 21, 2007 to Examiner's Office Communication dated Dec. 4, 2007 (16 pgs.).
United States Patent and Trademark Final Office Action for related U.S. Appl. No. 11/450,630 dated Feb. 13, 2008 (12 pgs.).
Applicant's Amendment and Response dated Feb. 21, 2008 to Examiner's Office Action dated Feb. 13, 2008 (19 pgs.).
United States Patent and Trademark Final Office Action for related U.S. Appl. No. 11/450,630 dated May 30, 2008 (15 pgs.).
Applicant's Amendment and Response dated Jun. 19, 2008 to Examiner's Final Office Action dated May 30, 2008 (18 pgs.).
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Applicant's Amendment and Response dated Aug. 6, 2008 to Examiner's Final Office Action dated Jul. 3, 2008 (21 pgs.).

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