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Graphene resonant analog-to-digital converter

An analog-to-digital converter, graphene technology, applied in analog-to-digital converters, electrical components, impedance networks, etc., can solve the problems of limited operating temperature range, high process difficulty, dependence on high-performance voltage reference, etc., to achieve high stability , high resolution, guarantee the effect of operating temperature range

Active Publication Date: 2021-09-21
BEIHANG UNIV
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  • Abstract
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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.

Method used

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  • Graphene resonant analog-to-digital converter

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Embodiment approach

[0118] 2.1 Determination of core link functions

[0119] In practical applications, it is necessary to know the core link function f k The specific formula (the values ​​of all coefficients have been determined, the quantitative formula of the specific value can be calculated, not the principle formula) to obtain g k .

[0120] The function f in the above principle 1 , f 2 , f 3 The corresponding relationship with the hardware entity is:

[0121] (1) function f 1 Corresponding to the drive circuit 1;

[0122] (2) function f 2 Corresponding to the modulation unit 2;

[0123] (3) function f 3 Corresponding to the graphene beam 3 described above.

[0124] Theoretically, according to the accurate values ​​of circuit structure and parameters, mechanical structure and size, and material property parameters, modeling (theoretical modeling or numerical simulation) of each hardware entity can obtain f 1 , f 2 , f 3 Formula (theoretical formula or fitting / interpolation formul...

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Abstract

The invention discloses a graphene resonant analog-to-digital converter, which is composed of a drive circuit, a modulation mechanism, a graphene beam, a vibration pick-up, a feedback circuit, a vibration exciter, a frequency measurement circuit, and a solving device. Quantity, output digital quantity. The drive circuit converts the input analog quantity into an intermediate signal. The modulation mechanism generates the modulation force, that is, the axial force acting on the graphene beam, under the control of the intermediate signal. The vibration pickup senses the vibration parameters and generates a vibration pickup signal. The feedback circuit inputs the vibration pickup signal and outputs the excitation signal. The vibrator generates an exciting force under the control of the exciting signal, that is, a normal force acting on the graphene beam. The frequency measuring circuit measures the resonant frequency. The solving device substitutes the measured value of the resonant frequency into the conversion function for calculation, and the obtained value is the digital quantity output by the graphene resonant analog-to-digital converter. The invention can effectively improve the stability, broaden the working temperature range, and realize higher radiation resistance 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H3/007H03H9/02H03H9/24H03M1/12
CPCH03H3/0073H03H3/0075H03H3/0076H03H9/02244H03H9/02393H03H9/02448H03H9/2405H03H9/2426H03H2009/02251H03M1/12
Inventor 邢维巍马翠萍樊尚春韦祎
Owner BEIHANG UNIV
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