A Ternary Carbon Nanoscale Field-Effect Transistor Successive Approximation Analog-to-Digital Converter

Abstract

The invention discloses a ternary carbon nanotube successive approximation analog-to-digital converter, which comprises a latch comparator, a successive comparison logic circuit, a control circuit, a first capacitor array and a second capacitor array, and the output of the lock comparator terminal is connected with the input end of the successive comparison logic circuit, and the output end of the successive comparison logic circuit is connected with the control circuit, the first capacitor array and the second capacitor array are three-valued capacitor arrays, and the first capacitor array and the second capacitor array are controlled by the control circuit The capacitor array is connected to three different voltages, which realizes the charging and discharging operation of different capacitor arrays, effectively avoids the invalid operation of the switch, and greatly reduces the power consumption of the circuit. The latch comparator utilizes the high-speed and low-power consumption characteristics of CNFET , use CNFET to design, further reduce energy consumption and power delay product; the advantages of energy consumption and power delay product are small, which is of positive significance for further research on larger-scale low-power three-valued successive approximation analog-to-digital converters.

Description

technical field [0001] The invention relates to an analog-to-digital converter, in particular to a successive approximation analog-to-digital converter of a ternary carbon nanometer field effect transistor. Background technique [0002] With the rapid development of digital signal processing technology, high-performance and high-efficiency analog-to-digital converters (ADC, Analog-to-Digital Converter) are widely used in mobile communication, sensors and environmental protection technology and other fields. Analog-to-digital converters are mainly divided into Flash ADC, integral ADC, and successive approximation (SAR, Successive Approximation Register) ADC according to function and speed. Successive approximation ADC, as a representative of medium speed, low power consumption and low cost, has the advantages of small delay, high sampling rate and good DC characteristics, and is widely used in medical equipment such as nuclear magnetic resonance imaging, scanners and X-rays. ...

AI Technical Summary

Problems solved by technology

However, the energy utilization rate of the binary capacitor array in the binary successive approximation analog-to-digital converter is low, the power consumption of the circuit is large, and the number of input and output ports is large, and the area expenditure is large.

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