Electric charge pump for controlling power consumption by voltage controlled oscillator

A voltage-controlled oscillator and charge pump technology, applied in the field of charge pumps, can solve problems such as high power consumption, and achieve the effect of improving power consumption

Active Publication Date: 2009-10-21
SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the charging mode in which the fixed-frequency oscillator provides the clock still generates large p

Method used

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  • Electric charge pump for controlling power consumption by voltage controlled oscillator

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Embodiment Construction

[0007] As shown in the figure, the charge pump using a voltage controlled oscillator to control power consumption of the present invention uses a forward diode D2, a reverse diode D1 and a MOS transistor MN1 in series and then connects them in series at the output end of the charge pump, wherein, The MOS transistor MN1 compares the current of the reference current source through a mirror structure, and the compared output voltage VB is used to control the input frequency of the charge pump, that is, the VCO structure.

[0008] The present invention effectively controls power consumption by means of current feedback control. When the reverse diode D1 in the above series circuit is not broken down, no current flows through the MOS transistor MN1, and compared with the reference current passing through the MOS transistor MP1, a higher voltage is output to VTOI (voltage-current conversion circuit), VTOI outputs a larger current to the ICO (current-controlled oscillator), so that t...

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Abstract

The invention discloses a charge pump using a voltage-controlled oscillator to control power consumption. A forward diode D2, a reverse diode D1 and a MOS transistor MN1 are connected in series to the output end of the charge pump. The MOS transistor MN1 compares the current of the reference current source through the mirror structure, and compares the output voltage VB to control the input frequency of the charge pump. The invention effectively improves the power consumption of the charge pump in actual operation. It can be applied in various EEPROM or Flash EEPROM circuits.

Description

technical field [0001] The present invention relates to a semiconductor integrated circuit, in particular to a charge pump for non-volatile memory (NVM), using a voltage-controlled oscillator (VCO) to control power consumption. Background technique [0002] The charge pump can operate in open-loop or closed-loop mode. Among them, in actual circuit applications, most of them work in a closed-loop mode to reduce power consumption. However, the charging mode in which the clock is provided by the fixed-frequency oscillator still generates relatively large power consumption under closed-loop feedback, that is, the constant power consumption of the oscillator itself. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a charge pump using a voltage-controlled oscillator to control power consumption, which controls the charge pump in a closed-loop manner and can effectively reduce power consumption. [0004] In order to so...

Claims

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Application Information

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IPC IPC(8): G11C16/06H02M3/07
Inventor 王楠
Owner SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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