Graphene resonant type analog-to-digital converter

Abstract

The invention discloses a graphene resonant type analog-to-digital converter, which is composed of a driving circuit, a modulation mechanism, a graphene beam, a vibration pickup, a feeder circuit, a vibration exciter, a frequency measurement circuit and a calculation device, wherein a tested analog value is input, and a digital value is output. The driving circuit converts the input analog value into a middle signal; the modulation mechanism generates modulation force under the control of the middle signal, namely axial force acting on the graphene beam; the vibration pickup senses a vibrationparameter and generates a vibration pickup signal; the feeder circuit inputs the vibration pickup signal and outputs a vibration excitation signal; the vibration exciter generates vibration excitation force under the control of the vibration excitation signal, namely normal force acting on the graphene beam; the frequency measurement circuit measures a resonant frequency; and the calculation device substitutes the measured value of the resonant frequency into a conversion function for calculation, and an obtained value is a digital value output by the graphene resonant type analog-to-digitalconverter. The graphene resonant type analog-to-digital converter can effectively improve the stability, extend the working temperature range and realize relatively high anti-radiation performance.

Description

technical field [0001] The invention belongs to the technical field of analog-to-digital converters (ADC), in particular to a graphene resonant analog-to-digital converter. Background technique [0002] 1. The requirement background of the present invention [0003] The invention is mainly oriented to high-performance measurement and control systems or precision measuring instruments in special fields. These systems require high-quality processing of low-frequency (30kHz ~ 3MHz) analog quantities, and sometimes high-frequency (3MHz ~ 30MHz) signals. For the ADC, it is required to take into account both the AC performance and the DC performance, and it can work in a wide temperature range (such as -55°C to +125°C or wider). With the development of demand, it is more and more inclined to build ADC in ASIC (Application Custom Integrated Circuit). In some occasions, it is also desirable to have certain requirements for anti-radiation indicators. This type of system is genera...

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Problems solved by technology

[0025] The invention solves the problems of high design difficulty, high process difficulty, limited working temperature range, difficulty in realizing anti-radiation index, large circuit scale, and dependence on high-performance voltage references faced by integrated high-performance ADCs in ASICs in special fields.

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