Method and system for fast calibration to cancel phase...

Details Method and system for fast calibration to cancel phase... Method and system for fast calibration to cancel phase...

2006-12-27

2008-10-14

Pascal, Robert J. (Department: 2817)

Amplifiers

With amplifier condition indicating or testing means

C330S295000

Reexamination Certificate

active

07436253

ABSTRACT:
Methods and systems for fast calibration to cancel phase feedthrough are disclosed and may comprise individually activating each of n binary-weighted cells utilizing a control signal in a power amplifier driver (PAD) and measuring the output signal, or offset, in response to a null signal applied to an input of each binary-weighted cell. This offset may be fed back, summed, and adjusted until the measured PAD output may be minimized. This calibrated offset may cancel phase feedthrough of the PAD, and the calibrated offset for each binary-weighted cell may be stored in a lookup table. The control signal may also be utilized for controlling the output power of the PAD by activating appropriate binary-weighted cells. For each of the 2noutput powers, a calibrated offset is calculated utilizing a weighted sum of the stored offsets for the activated binary-weighted cells.

REFERENCES:
patent: 4881042 (1989-11-01), Min et al.
patent: 2002/0008575 (2002-01-01), Oskowsky et al.
patent: 2006/0067427 (2006-03-01), Zolfaghari et al.

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