High-performance digital output port circuit

Abstract

A high-performance digital output port circuit includes a new fast low-to-high level conversion circuit and a new anti-ground bounce effect output drive circuit. By improving the traditional low-to-high level conversion unit, the problem of asymmetry between the rising edge and the falling edge of the traditional structure is solved, the delay power consumption product of the level conversion unit is reduced, and the transmission performance of the output terminal is improved; at the same time, the increase The ground bounce effect circuit is improved, the synchronous switching noise (SSN) of the terminal is reduced, and the transmission quality of the output signal of the terminal is improved.

Description

[0001] Technical field [0002] The invention relates to a high-performance digital output port circuit, which is suitable for the field of power domain. Background technique [0003] In a multi-power domain system, the digital output terminal mainly realizes the level conversion between the low power domain and the high power domain logic and provides functions such as output drive capability. The speed, power consumption and noise performance of the digital output terminal are high-speed, An important part of low-voltage, low-power system design. The digital output port of the traditional multi-power supply system mainly includes two parts: level shifting and output driving. Among them, the digital output terminal is used to realize the switching between the 1.8 V logic signal and the terminal 3.3 V signal inside the system; the output driver realizes the output of the signal, and the traditional low-to-high level conversion unit solves the problem of pull-up , The problem...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a high-performance digital output port circuit, which solves the problem of asymmetry between the rising edge and the falling edge of the traditional structure, reduces the delay power consumption product of the level conversion unit, improves the transmission performance of the output terminal, and reduces the Reduces the synchronous switching noise (SSN) of the terminal day and improves the transmission quality of the terminal day output signal

By improving the traditional low-to-high level conversion unit, the problem of asymmetry between the rising edge and the falling edge of the traditional structure is solved, the delay power consumption product of the level conversion unit is reduced, and the transmission performance of the output terminal is improved; at the same time, the increase The anti-ground bounce circuit reduces the synchronous switching noise (SSN) of the terminal day and improves the transmission quality of the terminal day output signal

Images