Trimming method and apparatus for voltage controlled delay...

Details Trimming method and apparatus for voltage controlled delay... Trimming method and apparatus for voltage controlled delay...

2007-02-06

2007-02-06

Nguyen, Linh My (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S158000

Reexamination Certificate

active

11020022

ABSTRACT:
Methods and apparatus are provided for trimming a desired delay element in a voltage controlled delay loop. The disclosed trimming process comprises the steps of obtaining a first phase signal of a reference clock; applying the first phase signal along a first path to the desired delay element and a common delay element connected in series to the desired delay element; applying the reference clock along a second path to a first delay element and the common delay element; measuring a delay difference between the first and second paths at an output of the common delay element; and adjusting a delay of the desired delay element based on the measured delay difference. The trimming method may be repeated for each delay element in a voltage controlled delay loop.

REFERENCES:
patent: 6043717 (2000-03-01), Kurd
patent: 6327318 (2001-12-01), Bhullar et al.
patent: WO 97/14214 (1997-04-01), None

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