Pulse or digital communications – Equalizers
Reexamination Certificate
2008-01-02
2011-12-06
Bocure, Tesfaldet (Department: 2611)
Pulse or digital communications
Equalizers
C375S295000, C375S296000
Reexamination Certificate
active
08073044
ABSTRACT:
A calibration circuit measures the variation in a filter resistor within the analog domain of the envelope path of a polar transmitter and produces a digital value representative of that variation. A digital processor determines a digital control signal from the digital value that is used to compensate, in the digital domain of the envelope path, for the variation in the filter resistor in the analog domain.
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Yan Li et al., “A De-Cresting Technique for Polar Transmitter Using Envelop-Tracking (ET) and SiGe Power Amplifier for Mobile WiMax,” IEEE, 2009, pp. 1-4.
Huang et al., “Filter Consideration in Polar Transmitters for Multi-mode Wireless Application,” IEEE, 2005, pp. 1-4.
Darabi Hooman
Jensen Henrik T.
Zolfaghari Alireza
Bocure Tesfaldet
Broadcom Corporation
Garlick & Harrison & Markison
Rudnick Holly L.
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