High-speed and high-bandwidth signal conversion method and analog-to-digital converter

Abstract

According to the high-speed and high-bandwidth signal conversion method and the analog-to-digital converter, an input signal is received through a front-end input signal matching circuit, the front-end input signal matching circuit is connected with a differential operational amplifier module, the received signal is converted into a differential signal from a single-end signal through the differential operational amplifier module, and the differential operational amplifier module is connected with a comparator module; the differential signal is converted into a discrete signal represented by a numerical value through the comparator module, and analog-to-digital conversion of the signal is completed. According to the analog-to-digital converter, single-end signals are converted into double-end differential signals in the analog-to-digital converter, so that the analog-to-digital converter can be made into a large-scale integrated circuit, and the analog-to-digital converter has a stronger anti-interference effect on environmental noise and power supply noise, inhibits interference of common-mode signals and reduces the offset voltage influence of a comparator.

Description

technical field [0001] The invention belongs to the field of integrated circuits, and in particular relates to a high-speed, high-bandwidth signal conversion method and an analog-to-digital converter. Background technique [0002] With the advancement of analog-to-digital converter (ADC) technology, its sampling rate is getting higher and higher, its bandwidth is getting wider and wider, and there are more and more solutions for input signal processing, but it is necessary to realize the design of high-speed and high-bandwidth analog For the converter, the Balun system (Balun) is generally selected as the front-end driver, so as to better maintain the performance of the ADC. [0003] Such as figure 1 As shown, the signal is connected from the SMA, converted into a differential signal by Balun, and then enters the internal processing of the ADC through capacitive coupling. However, due to the addition of Balun on-chip, the volume is relatively large, occupying a large area,...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-speed, high-bandwidth signal conversion method and an analog-to-digital converter for the high-speed and high-bandwidth analog-to-digital converters in the prior art that are difficult to integrate using a balun system. The single-ended signal to double-ended differential signal is realized inside the converter, which is conducive to making the analog-to-digital converter into a large-scale integrated circuit and improving the conversion capability

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