Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Reexamination Certificate
2007-02-13
2007-02-13
Callahan, Timothy P. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
C327S148000
Reexamination Certificate
active
10926596
ABSTRACT:
The present invention provides for compensation of leakage charge in a PLL. A first plurality and second plurality of charge pumps has a source charge pump and a sink charge pump, and each charge pump has its own switch. A first node is coupled between at least one source charge pump and at least one sink charge pump. A second node coupled between at least one source charge pump and at least one sink charge pump. A PLL filter is coupled to the first node. A dummy filter is coupled to the second node. A first input of a differential mode sensor is coupled to the PLL filter. A second input of a differential mode sensor is coupled to the dummy filter. A first input of a common mode sensor is coupled to the dummy filter. A second input of a common mode sensor coupled to the PLL filter.
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Baez Franklin Manuel
Boerstler David William
Hailu Eskinder
Miki Kazuhiko
Callahan Timothy P.
Carr LLP
Gerhardt Diana R.
International Business Machines - Corporation
Nguyen Hai L.
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