Internal voltage generator

a technology of internal voltage and generator, which is applied in the direction of instruments, fastenings, and apparatuses without intermediate ac conversion, etc., can solve the problems that the conventional internal voltage generator cannot generate an internal voltage and the output of pumped voltage cannot be efficiently achieved

Inactive Publication Date: 2008-03-20
SK HYNIX INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The solution allows for the stable generation of an internal voltage with a lower voltage level than the external power supply, addressing the limitations of conventional generators and maintaining efficiency in voltage output.

Problems solved by technology

However, the conventional internal voltage generator cannot generate an internal voltage whose voltage level is lower than −VDD.
Accordingly, a pumped voltage cannot be efficiently outputted as the internal voltage.

Method used

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Embodiment Construction

[0056] Hereinafter, an internal voltage generator in accordance with the present invention will be described in detail referring to the accompanying drawings.

[0057]FIG. 6 is a block diagram showing an internal voltage generator in accordance with a preferred embodiment of the present invention.

[0058] As shown, the internal voltage generator includes a level detector 100, an oscillator 200, a latch unit 300, a first pumping control signal generator 400, a second pumping control signal generator 450, a first charge pumping unit 500, a second charge pumping unit 550 and an output driver 600.

[0059] The first and the second charge pumping units 500 and 550 perform a negative charge pumping operation to an external power supply voltage VDD in order to generate a voltage whose voltage level is lower than that of the external power supply voltage VDD. An output voltage of the first charge pumping unit 500 and an output voltage of the second charge pumping unit 550 are outputted as an int...

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Abstract

An internal voltage generator for stably generating an internal voltage includes a latch unit for outputting a first and a second driving signals based on a periodic signal; a first pump block for generating the internal voltage in response to the first driving signal; and a second pump block for generating the internal voltage in response to the second driving signal.

Description

FIELD OF THE INVENTION [0001] The present invention relates to an internal voltage generator; and, more particularly, to an internal voltage generator for stably maintaining an internal voltage level having a short response time. DESCRIPTION OF RELATED ARTS [0002] Generally, an internal voltage generator included in a semiconductor memory device generates various voltages used in the semiconductor memory device by using an external power supply voltage. Recently, the internal voltage generator is widely used in a dynamic random access memory (DRAM) as an operational voltage and a power consumption of the DRAM are decreased. [0003] Meanwhile, since the internal voltage is internally generated, it is important to stably generate the internal voltage regardless of variations of process, temperature or pressure. [0004]FIG. 1 is a block diagram showing a conventional internal voltage generator. [0005] As shown, the conventional internal voltage generator includes a charge pumping unit 40...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): G05F1/44
CPCH02M3/07G11C5/14A43C15/161A43B13/30
InventorLEE, KANG-SEOLIM, JAE-HYUK
OwnerSK HYNIX INC