Internal power source circuit

Abstract

An internal power supply circuit including a first output metal oxide semiconductor transistor (Q1) for delivering a first reference voltage (V ref ), an internal reference voltage generating circuit (10) for generating a second reference voltage from the output voltage of (Q1), and an output metal oxide semiconductor transistor (Q2) which operates at the source according to the second internal reference voltage Follower mode. The internal reference voltage generating circuit (10) has the function of eliminating the influence of the threshold voltages of the output metal oxide semiconductor transistor (Q2) and the first metal oxide semiconductor transistor (Q1) on the internal voltage VINT on the output node (4).

Description

technical field [0001] The present invention relates to a circuit for generating a specified level voltage in a semiconductor device, and more particularly to a structure of an internal power supply circuit for generating an internal power supply voltage by reducing an external power supply voltage, and particularly to a low power consumption internal power circuit. Background technique [0002] In a semiconductor integrated circuit, a voltage source is required in some cases to supply a voltage of a prescribed voltage level independent of an external power supply voltage. One of such cases is as follows, in order to achieve higher density and higher level of integration, semiconductor components are miniaturized. The breakdown voltage of miniaturized semiconductor elements decreases, and therefore, the power supply voltage (operating power supply voltage) of a semiconductor integrated circuit including these miniaturized semiconductor elements as its components must be low...

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Problems solved by technology

This results in relatively large current consumption

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