Analog-to-digital conversion device and analog-to-digital conversion method

Abstract

The invention relates to the technical field of a semiconductor integrated circuit and manufacturing thereof and discloses an analog-to-digital conversion device and an analog-to-digital conversion method. The analog-to-digital conversion device comprises a data sampling and holding unit, a quantizing unit and an encoding unit, wherein the data sampling and holding unit is used for carrying out data sampling to obtain an analog voltage signal and storing the analog voltage signal; the quantizing unit is used for quantizing the analog voltage signal output by the data sampling and holding unit; the encoding unit is used for encoding data output by the quantizing unit to obtain a digital signal; and the data sampling and holding unit comprises a resistance random access memory. According to the invention, the data storage (or holding) in the analog-to-digital conversion process is implemented by utilizing the resistance random access memory; and experiments show that data holding time can reach 10 years, and thus, the data reliability can be ensured, so that the operational reliability of the analog-to-digital conversion device is also ensured. Moreover, the device disclosed by the invention has a simple structure and is low in cost.

Description

technical field [0001] The invention relates to the technical field of semiconductor integrated circuits and their manufacture, in particular to an analog-to-digital conversion device and an analog-to-digital conversion method. Background technique [0002] The circuit that converts analog signals into digital signals is called an analog-to-digital converter (Analog to Digital Converter), that is, an A / D converter. The mutual conversion between analog signal and digital signal is of great significance. First of all, digital signals have the advantages of simple structure, strong anti-interference ability, good stability, high degree of automation in design and testing, and easy realization of large-scale integration. Using digital signals to process analog signals in signal transmission, processing, storage, output and display Confidentiality and other aspects have very obvious advantages. Secondly, with the advancement of integrated circuit technology and the rapid develo...

AI Technical Summary

Problems solved by technology

The traditional sample-and-hold circuit includes a sampling switch and a holding capacitor, but storing the sampling signal through the holding capacitor has the disadvantage of holding a voltage drop

Because the capacitor always has a discharge path, the output voltage drops during the hold period, resulting in signal distortion. Although increasing the capacitor capacity can reduce the voltage drop, it will increase the sampling time.

In addition, in integrated circuit design, the design and implementation of capacitors face some inherent difficulties: for ordinary small capacitors, the source and drain of MOS transistors are connected to realize, and the volume of such a capacitor is the volume of a switch

Although there are many designs to reduce the volume of capacitors, these methods usually consume a considerable amount of volume in integrated circuits.

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