Three-value carbon nanotube successive approximation analog-digital converter

Abstract

The invention discloses a three-value carbon nanotube successive approximation analog-digital converter. The three-value carbon nanotube successive approximation analog-digital converter comprises a bolt lock comparator, a successive comparison logic circuit, a control circuit, a first capacitor array and a second capacitor array; an output end of the lock comparator is connected with an input end of the successive comparison logic circuit, an output end of the successive comparison logic circuit is connected with the control circuit, the first capacitor array and the second capacitor array are the three-value capacitor arrays; the first capacitor array and the second capacitor array are controlled by the control circuit for connecting to three types of voltage for charging and discharging the different capacitor array, effectively avoiding the invalid operation for the switch and greatly reducing the circuit power consumption; the bolt lock comparator adopts the high speed and low power consumption characteristic of the CNFET and adopts the CNFET for designing, the energy consumption and power time delay product can be further reduced; the energy consumption and power time delay product are less, and positive significance can be obtained for further researching low power consumption three-value successive approximation analog-digital converter with larger scale.

Description

technical field [0001] The invention relates to an analog-to-digital converter, in particular to a ternary carbon nanotube successive approximation analog-to-digital converter. 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. [0003] At present, the rese...

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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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