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High performance charge pump of preventing countercurrent

A technology of reverse current and charge pump, applied in the field of charge pump

Inactive Publication Date: 2005-08-31
GLOBAL MIXED MODE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In view of the aforementioned problems, an object of the present invention is to provide a charge pump that can prevent reverse current from occurring when the clock signal is in a stable state, thereby improving the efficiency of voltage conversion

Method used

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  • High performance charge pump of preventing countercurrent
  • High performance charge pump of preventing countercurrent
  • High performance charge pump of preventing countercurrent

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Embodiment Construction

[0049] The foregoing and other objects, features, and advantages of the present invention will be more apparent from the following description and accompanying drawings. Preferred embodiments according to the present invention will be described in detail with reference to the drawings.

[0050] FIG. 3( a ) shows a detailed circuit diagram of a high-efficiency charge pump 30 for preventing reverse current according to the first embodiment of the present invention. Referring to FIG. 3(a), the charge pump 30 according to the first embodiment of the present invention includes an input stage 30 in , intermediate level 30 int , and the output stage 30 out . About the input stage 30 in , specifically, the NMOS transistor N 1 with N 2 Both first current electrodes are coupled to a supply voltage source V in . NMOS transistor N 1 The control electrode is coupled to the NMOS transistor N 2 the second current electrode, and the NMOS transistor N 2 The control electrode is coup...

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Abstract

First and second clocks are applied to first and second capacitors respectively. First and second preceding stage clocks are applied to first and second preceding stage capacitors. The first switch is coupled to second preceding stage capacitor and first capacitor. The second switch is coupled to first preceding stage capacitor and second capacitor. First circuit of preventing countercurrent makes control pole of first switch be coupled to second capacitor and second preceding stage capacitor alternately. Second circuit of preventing countercurrent makes control pole of second switch be coupled to first capacitor and first preceding stage capacitor alternately. Trailing edges of first and second clocks are earlier than trailing edges of first and second preceding stage clocks respectively. Rising edges of first and second preceding stage clocks are earlier than trailing edges of first and second clocks respectively.

Description

technical field [0001] The invention relates to a charge pump, in particular to a charge pump capable of preventing reverse current from occurring, so as to realize a high-efficiency voltage conversion function. Background technique [0002] figure 1 A detailed circuit diagram of a conventional charge pump 10 is shown. NMOS transistor N 1 with N 2 The first current electrodes of both are coupled to a supply voltage source V in . NMOS transistor N 1 The control electrode is coupled to the NMOS transistor N 2 the second current electrode, while the NMOS transistor N 2 The control electrode of is coupled to the NMOS transistor N 1 the second current electrode. Capacitor C 1 The first electrode is coupled to the NMOS transistor N 1 the second current electrode, and the capacitor C 2 The first electrode is coupled to the NMOS transistor N 2 the second current electrode. [0003] NMOS transistor N 3 The first current electrode is coupled to the NMOS transistor N 2 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07
Inventor 陈天赐曾光男
Owner GLOBAL MIXED MODE TECH