Track-to-track input buffer

Abstract

A track-to-track input buffer comprises a comparison circuit and a level conversion circuit. The comparison circuit receives an input voltage to provide a comparison voltage. The level conversion circuit is coupled to the comparison circuit to receive the comparison voltage, and also receives a system high voltage and a ground voltage. If the comparison voltage is a high-voltage level, the level conversion circuit converts the comparison voltage into the system high voltage so that the system high voltage serves as an output voltage. If the comparison voltage is a low-voltage level, the level conversion circuit converts the comparison voltage into the ground voltage so that the ground voltage serves as an output voltage.

Description

technical field [0001] The present invention relates to an input buffer, and more particularly to a rail-to-rail input buffer. Background technique [0002] With the development of technology, consumer electronic devices are gradually popularized, and with the advancement of semiconductor technology, integrated circuits (ICs) have become important components in electronic devices. The input buffer is configured in the integrated circuit to convert the external analog voltage into a corresponding logic level, so that the signal can be transmitted smoothly. Moreover, the input buffer can not only convert the voltage signal, but also adjust the driving capability of the output signal to meet the receiving requirements of the internal circuit of the integrated circuit. [0003] In terms of digital logic, the logic level is divided into high logic level and low logic level. Generally, the greater the voltage difference between the high logic level and the low logic level, the be...

AI Technical Summary

Problems solved by technology

Among them, the input buffer will use the comparator to convert the analog signal into a digital signal, but the output voltage of the comparator cannot achieve the rail-to-rail effect, so the traditional input buffer will amplify the output signal of the comparator through the differential amplifier , to achieve rail-to-rail output effect

However, the difference amplifier requires bias current, which in turn pulls up the comparator current, so that the overall power consumption of the input buffer increases

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