Level shift circuit

Abstract

The invention provides a level shift circuit, and the circuit comprises a cross-coupled load circuit, a first transistor, a second transistor, a third transistor, and a fourth transistor, wherein: thesource electrode of the first transistor is coupled to a first signal high-level end; the source electrode of the second transistor is coupled to the first signal low-level end; the gate of the firsttransistor and the gate of the second transistor are coupled to a first supply voltage; the drain electrode of the first transistor is connected to the source electrode of the third transistor; the drain electrode of the second transistor is connected to the source electrode of the fourth transistor; the drain electrode of the third transistor is connected to a second signal high-level end, the drain electrode of the fourth transistor is connected to a second a second signal low-level end, and the gate of the third transistor and the gate of the fourth transistor are connected to a second power supply voltage; the cross-coupled load circuit is connected with the drain electrode of the third transistor and the drain electrode of the fourth transistor; the second supply voltage is used forsupplying power to the cross-coupled load circuit.

Description

technical field [0001] The invention relates to the technical field of semiconductors, in particular to a level shift circuit. Background technique [0002] In high-speed interface circuits, the interface voltage is usually relatively high, such as figure 1 As shown, the interface voltage of the interface circuit of the chip is 1.08V ~ 1.98V, and the internal voltage of the chip is usually relatively low. The level shift circuit is used to level shift the low voltage signal inside the chip to the high voltage signal circuit of the interface level, or vice versa. The level shifting circuit is a key part in the design of high-speed interface circuits, especially the low-to-high level shifting circuit, and its performance is directly related to the quality of the interface signal. With the advancement of technology, the internal voltage of the chip is getting lower and lower. For example, the internal voltage of the 28nm process chip has been reduced to 0.81V. The traditional...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a level shifting circuit to solve the problem that the existing level shifting circuit cannot balance the requirements of low input level, high speed operation and low power consumption

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