Patent ID: 6794911
Filing Date: 2004-09-21
Classification: H03L

Abstract:
A charge-pump circuit for charge-share suppression, comprising:a first current source for receiving a voltage from a voltage generator and providing a current output; a first switching element coupled between a first connecting node and an output terminal, status of which is controlled by an input signal; a first load coupled between the first switching element and the output terminal, receiving the current and outputting voltage at the output terminal when the first switching element is in â€œOnâ€  state; a second switching element, the second switching element controlled by the input signal and opposite to the first switching element; a second current source coupled between the second switching element and ground and coupled to the second switching element through a second connecting node; a second load coupled between the second switching element and the output terminal, the second load receiving the output voltage when the second switching element is in â€œOnâ€  state; a first feedback circuit for maintaining a constant relation between the output voltage and a voltage of the first node, not influenced by the status of the first and second switching elements; and a second feedback circuit for maintaining a constant relation between the output voltage and a voltage of the second node, not influenced by the status of the first and second switching elements; wherein at least one of the feedback circuit further comprises: a third load coupled between the output terminal and the ground, receiving the output voltage when the second switching element is in â€œOnâ€  state, wherein the components of the third load are the same as the components of the first load; and a third switching element coupled between the third load and the first current source, wherein a status of the third switching element is the same as the second switching element and an impedance of the third switching element in â€œOnâ€  state is the same as that of the first switching element in â€œOnâ€  state.