Method and apparatus for charge leakage compensation for...

Details Method and apparatus for charge leakage compensation for... Method and apparatus for charge leakage compensation for...

2010-03-26

2011-10-18

Lam, Tuan T (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S157000

Reexamination Certificate

active

08040167

ABSTRACT:
An apparatus is disclosed, the apparatus comprising: a charge pump for receiving a phase signal representing a result of a phase detection and for outputting a current flowing between an internal node and an output node; a capacitive load shunt at the output node; a current source controlled by a bias voltage for outputting a compensation current to the internal node; a current sensor inserted between the internal node and the output node for sensing the current; and a feedback network for adjusting the bias voltage in accordance with an output of the current sensor.

REFERENCES:
patent: 5736880 (1998-04-01), Bruccoleri et al.
patent: 7701271 (2010-04-01), Sanielevici et al.
patent: 2001/0052807 (2001-12-01), Vaucher
patent: 2003/0107420 (2003-06-01), Hsu et al.
patent: 2008/0068058 (2008-03-01), Kim et al.
patent: 2009/0189654 (2009-07-01), Clements et al.
patent: 2009/0243671 (2009-10-01), Draxelmayr

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