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Four-phase charge pump with lower peak current

A charge pump, charge technology, applied in circuits, conversion equipment without intermediate conversion to AC, electrical components, etc., can solve the problems of charge pump requirements that have not been fully met, low power supply noise and noise floor

Inactive Publication Date: 2004-02-11
MACRONIX INT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] To date, the need for charge pumps with lower supply noise and noise floor has not been fully met

Method used

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  • Four-phase charge pump with lower peak current
  • Four-phase charge pump with lower peak current
  • Four-phase charge pump with lower peak current

Examples

Experimental program
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Embodiment Construction

[0041] Figure 4 A block diagram of a low peak current charge pump based on the present invention is shown. exist Figure 4 , the clock signal circuit 600 provides the pumping timing signal 610 to the pumping timing circuit 700 . Pump timing circuit 700 provides an amplified pump timing signal to pump stage 900 . Clock circuit 800 processes the internal signals of pump timing circuit 700 and helps process pump timing signal 610 into an amplified pump timing signal.

[0042] Figure 5 is a voltage versus time timing diagram for the pump timing signal 610 provided by the clock signal circuit 600 . The pump timing signal 610 includes a sequence of four periodic pulses: a first pump clock signal 620 , a second delivery clock signal 640 , a second pump clock signal 660 , and a first delivery clock signal 680 . The components of the first pumping clock signal 620 include a high level 622 , a falling edge 624 , a low level 626 , a rising edge 628 , and a high level 630 . The comp...

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PUM

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Abstract

A four-phase charge pump circuit suitable for use on integrated circuits includes circuitry (900) that drives charge pump nodes in two components separated by a time delay. A capacitor connected to a node (722) is pumped low by an inverter and then by a transistor after a certain delay.

Description

technical field [0001] The present invention relates to the field of charge pump circuits, and to integrated circuits that use charge pumps to generate on-chip voltages that exceed the range of off-chip supply voltages. Background technique [0002] When the peak current drives the charge pump, the charge pump generates a lot of supply and floor noise. When a power supply or ground line is shared between a charge pump and another analog circuit block on the same chip, the other analog circuit blocks can be affected by the supply or floor noise generated by the charge pump. Also, flash memory structures and mixed-mode integrated circuit architectures often share power or ground between the charge pump and another analog circuit block. What is needed is a charge pump that produces less supply and floor noise, especially for sharing supply and / or ground lines between the charge pump and another analog circuit. [0003] FIG. 1 shows a block diagram of a charge pump 100 . In F...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/04H01L21/822H02M3/07
CPCH02M3/073H02M2003/075A61P37/00H02M3/075
Inventor 林俞伸洪俊雄万瑞霖
Owner MACRONIX INT CO LTD