Method and apparatus for change pump circuit

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

Reexamination Certificate

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C327S148000

Reexamination Certificate

active

06888386

ABSTRACT:
Charge-pumps consistent with this invention comprise a first transistor for sinking a current from an output node; a second transistor coupled between the first transistor and a ground node, wherein the second transistor interrupts the sinking current when the second transistor is turned off; and a current source to provide a turn-off current to a common node between the first transistor and the second transistor when the second transistor interrupts the sinking current. Charge-pump circuits consistent with this invention comprise a first transistor for sinking a current from an output node; a second transistor coupled between the first transistor and a ground node, wherein the second transistor interrupts the sinking current when the second transistor is turned off; and a clamping circuit to clamp a common node between the first transistor and the second transistor below a clamping voltage.

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patent: 2360 155 (2001-12-01), None
Paul Horowitz et al., “The Art of Electronics”, Second Edition, Cambridge University Press 1980, 1989, pp. 641-655.
Roland E. Best, “Phase-Locked Loops,” McGraw-Hill, 1999, pp. 91-176.

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