Current-mismatch compensated charge pump for phase-locked loop applications

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United States of America

PATENT NO 12155392
APP PUB NO 20230370072A1
SERIAL NO

18247240

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Abstract

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The disclosed embodiments provide various compensated charge pumps (CPs) which have a current mismatch compensation circuitry and various CP output-current-mismatch compensation structures based on using a dummy charge pump (CPdum) and feedback loops. In some embodiments, the CPdum is identically biased as the CP to be compensated. CPdum is configured to sense the output voltage and use the feedback loops to generate compensation currents for the CP. The compensation currents simultaneously compensate CP and CPdum. Moreover, CPdum is loaded with high impedance so that the compensation current makes sure CPdum doesn't have current mismatch. Because CP and CPdum have identical biasings and are compensated in the same manner with the same amount of current, CP output current mismatch is hence effectively eliminated.

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Patent Owner(s)

Patent OwnerAddress
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA1111 FRANKLIN STREET TWELFTH FLOOR OAKLAND CA 94607-5200

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Momeni, Omeed Davis, US 13 28
Wang, Hao Davis, US 906 6386

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