Electric charge pump for controlling power consumption by voltage controlled oscillator

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...

AI Technical Summary

Problems solved by technology

However, the charging mode in which the fixed-frequency oscillator provides the clock still generates large power consumption under closed-loop feedback, that is, the constant power consumption of the oscillator itself

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