Receiver Circuit

Abstract

A receiver circuit including an external terminal, a level shifter, a reset circuit, and an inverting circuit is provided. The external terminal receives the external signal. The level shifter shifts a voltage swing range of the external signal to generate a level shifting signal. The level shifter includes a pull-up unit and a pull-down unit coupled in series. The pull-up unit and the pull-down unit are alternatively switched respectively according to the external signal and the internal signal, and thus a leakage path of the level shifter is cut off for different states of the external signal. The reset circuit couples the external terminal and the level shifter and provides a reset path according to the external signal for assisting the switching of the pull-up unit and the pull-down unit. The inverting circuit couples the level shifter and inverts the level shifting signal to generate the internal signal. The pull-up unit and the pull-down unit are switched alternatively in response to the external signal and the internal signal, the leakage current path of the level shifter is cut off, thereby reducing the power loss flowing through a leakage current of the level shifter.

Description

technical field [0001] The invention relates to a receiving circuit, in particular to a receiving circuit applied to a level shifter with low leakage current. Background technique [0002] Semiconductor chips (integrated circuits) are the most important hardware foundation of the modern information society. Chips with different functions are integrated to form an electronic system with multiple functions, and various chips with different functions exchange data and signals with each other. Signals transmitted and received through the chip may have voltage swings between 0 volts (Volt, V) and 3.3V to establish various circuit operations, where 3.3V represents a high state (i.e., logic 1) and 0V represents Low state (ie, logic 0). However, as the semiconductor process involves advanced processes toward semi-micron depths, current chips use low-voltage devices (eg, transistors) to develop integrated circuits. Low-voltage devices contain a lower voltage swing range between 0V...

AI Technical Summary

Problems solved by technology

However, traditional level shifters have problems with leakage current paths

Power dissipation due to leakage current flowing through the level shifter can be severely increased, resulting in high power dissipation

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