Level shifter

Abstract

A level shifter consists of the first set and the second set of circuits. It is featured as forming each set of circuit by a switch circuit and two MOS tubes, connecting source electrode of the second MOS tube to the second power supply, controlling on-off of switch circuit by input signal based on the first power supply and outputting an output signal based on the second power supply by the first MOS tube in the first set circuit after drain electrode of said first MOS tube is phase-inversed.

Description

technical field [0001] The invention relates to the technical field of microelectronics, in particular to a level shifter. Background technique [0002] The common CMOS level shifter has the characteristics of fast speed and small area, and is often used in digital-analog hybrid circuits. Generally, as shown in Figure 1, its components include: high-threshold MOS transistors M1~M4, and low-threshold Inverters 1-2 composed of MOS transistors, and inverter 3 composed of high-threshold MOS transistors. The function of the level shifter is to convert the input signal A whose logic level is VDD-0 into the output signal Y whose logic level is HVDD-0, wherein HVDD is greater than VDD. [0003] In Figure 1, assume the initial state: the input signal A is logic 0, M1 is turned off, M2 is turned on, the voltage of the N1 node is HVDD level, the voltage of the N2 node is 0 level, M3 is turned on, and M4 is turned off. When the input signal A changes from logic 0 to logic 1, the gate ...

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a level shifter, which is used to solve the problems of slow processing speed and high power consumption during conversion of the level shifter in the prior art

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