Dynamic logic control circuit applied to SAR ADC

Abstract

The invention provides a dynamic logic control circuit applied to an SAR ADC, which comprises a sampling switch circuit, a digital-to-analog converter and a comparator, wherein a differential input signal Vip is input into the first end of the sampling switch circuit, and a differential input signal Vin is input into the second end of the sampling switch circuit; the first end of the digital-to-analog converter is electrically connected with the third end of the sampling switch circuit, and the second end of the digital-to-analog converter is electrically connected with the fourth end of the sampling switch circuit; the first end of the comparator is electrically connected with the third end of the digital-to-analog converter, and the second end of the comparator is electrically connectedwith the fourth end of the digital-to-analog converter. According to the dynamic logic control circuit applied to the SAR ADC, the logic control circuit is simple in structure, the number of components is reduced, power consumption is reduced, the power consumption and complexity of the SAR ADC can be effectively reduced, and meanwhile the conversion speed of the logic control circuit can be increased.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a dynamic logic control circuit applied to SAR ADC. Background technique [0002] Analog to Digital Converter (Analog to Digital Convert, ADC), as the interface between analog circuit and digital circuit, is an important bridge between analog signal and digital signal. Convert to a discrete digital signal. ADCs are widely used and are often used in mobile communications, biomedical, wearable devices and other fields. There are several types of commonly used ADCs, such as Flash ADC, Pipeline ADC, Sigma Delta ADC, and SARADC. In the rapid development of mobile communication, higher requirements are placed on the power consumption and complexity of mobile terminal equipment. SAR ADC (Successive Approximation Analog-to-Digital Converter) is widely used because of its low power consumption and simple structure. . In recent years, the technical improvement of SAR ADC has...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a dynamic logic control circuit applied to SAR ADC, and its purpose is to solve the problem that the power consumption and complexity of the logic control circuit in the traditional SAR ADC need to be reduced

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