Variation tolerant charge leakage correction circuit for...

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing

Reexamination Certificate

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Details

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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