Calibration of a current source array

Details Calibration of a current source array Calibration of a current source array

2006-05-09

2006-05-09

Nguyen, John B (Department: 2819)

Coded data generation or conversion

Converter calibration or testing

C341S136000

Reexamination Certificate

active

07042374

ABSTRACT:
A current source cell includes a current source providing a first current where the first current can be calibrated, first and second switches coupled to steer the first current to respective first and second output terminals in response to respective first and second control signals, and a latch circuit generating the first and second control signals. The latch circuit drives the first and second control signals to a first logical state to cause the first and second switches to open. The first current is then calibrated. After calibration, the latch circuit drives the first and second control signals to have logical states that correspond to a data signal as triggered by a clock signal where the first and second control signals have inverse logical states. One of the first and second switches is closed to steer the first current to a respective one of the first and second output terminals.

REFERENCES:
patent: 5254994 (1993-10-01), Takakura et al.
patent: 5689258 (1997-11-01), Nakamura et al.
patent: 6608578 (2003-08-01), Lee et al.
D. Wouter J. Groeneveld et al., “A Self-Calibration Technique for Monolithic High-Resolution D/A Converters,” IEEE Journal of Solid-State Circuits, vol. 24, No. 6, Dec. 1989, pp. 1517-1522.

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