Pre-amplification level switching circuit

Abstract

The invention relates to the field of integrated circuits, for converting a level signal of a multi-power system, and thus the extremely low level signal can be converted into a high level signal. Thepre-amplification level switching circuit provided by the invention has the structure including PMOS transistors consisting of MP1, MP2, MP3, MP4, MP5, MP6, MP7 and MP8; 8 NMOS transistors consistingof MN1, MN2, MN3, MN4, MN5, MN6, MN7 and MN8; and two phase inverters INV1 and INV2, wherein the MP1, MP2, MP3, MP4, MP5, MP6, MP7, MP8, MN7 and MN8 are MOS transistors having thick gate oxide layers; a working power supply is a high power voltage VDDH; MN1, MN3, MN4 and MN6 are MOS transistors having thin gate oxide layers. The pre-amplification level switching circuit provided by the inventionis mainly applied to design and manufacture of the integrated circuits.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to the design of a level signal conversion circuit for a multi-voltage source system. In particular, it relates to a level conversion circuit with pre-amplification. Background technique [0002] In a complex SOC, the voltage source is not unique, and the power used by different module circuits will be different. The amplitude of the level signal obtained by different power supply voltages is different, and the level signal obtained by low power supply voltage is very low. , and the signal with too low level will affect the propagation of the signal, so the level conversion circuit is an indispensable interface circuit in the multi-power system. The traditional level conversion circuit is based on the method of differential cascaded voltage switches. Although low-level signals can be converted into high-level signals, this structure will fail when the input level signal is at a l...

AI Technical Summary

Problems solved by technology

The traditional level conversion circuit is based on the method of differential cascaded voltage switches. Although low-level signals can be converted into high-level signals, this structure will fail when the input level signal is at a lower level.

In order to solve the problem of converting lower-level signals into high-level signals in multi-power supply systems, the present invention proposes a level conversion circuit with pre-amplification, which can complete low-level signals to high-level signals in multi-power supply systems. Level signal conversion

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