Apparatus for calibrating a charge pump and method therefor

Details Apparatus for calibrating a charge pump and method therefor Apparatus for calibrating a charge pump and method therefor

2006-02-14

2006-02-14

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

Reexamination Certificate

active

06998891

ABSTRACT:
A signal calibration apparatus of a charge pump minimizes a current from the charge pump. The signal calibration apparatus includes a detecting circuit, a current adjusting circuit, and a calibrating circuit, wherein the detecting circuit is coupled to the charge pump for outputting a detecting signal according to the direction and magnitude of the current, the current adjusting circuit is coupled to the detecting circuit for outputting a calibrating signal according to the polarity and magnitude of the slew rate of the detecting signal; and the calibrating circuit, which consists of a first calibration current source and a second calibration current source, is respectively coupled to the charge pump and the current adjusting circuit for adjusting the first current and the second current by outputting a first calibrating current and second calibrating current to the charge pump.

REFERENCES:
patent: 3944936 (1976-03-01), Pryor
patent: 4491799 (1985-01-01), Giardinelli
patent: 5334953 (1994-08-01), Mijuskovic
patent: 5508660 (1996-04-01), Gersbach et al.
patent: 6229362 (2001-05-01), Choi
patent: 2002/0176188 (2002-11-01), Ruegg et al.

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