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An adc multi-input signal crosstalk model circuit

A signal crosstalk, multi-input technology, applied in the field of signal crosstalk, can solve problems such as multi-channel signal crosstalk, and achieve the effects of improving integration, reducing design area, and improving design efficiency

Active Publication Date: 2022-06-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes an ADC multi-input signal crosstalk model circuit for the above-mentioned multi-channel signal crosstalk at the ADC input terminal

Method used

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  • An adc multi-input signal crosstalk model circuit
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  • An adc multi-input signal crosstalk model circuit

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Embodiment Construction

[0010] Below in conjunction with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely

[0012] The signal input terminal [VinA] is connected to one end of the capacitor [C1], one end of the resistor [R1], one end of the capacitor [Ct1] and the electrical

[0013] The function of the multi-input signal crosstalk model circuit is shown in Figure 1. After closing the sampling switch [K1], the sampling switch is disconnected again.

[0015] Although illustrative embodiments of the present invention have been described above in order to facilitate knowledge of the art

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Abstract

The present invention proposes an ADC multi-input signal crosstalk model circuit, and provides the circuit structure and connection relationship. Since the distance between the two input terminals determines the capacitance value and the coupling coefficient of the coupling capacitor, by changing the distance between the two input terminals The distance between the coupling capacitors can be used to reduce the capacitance value of the coupling capacitor, which can reduce the crosstalk amplitude between the signal input terminals. The above model circuit is used to calculate the distance between the signal input terminals corresponding to the crosstalk amplitude, and then the distance between the signal input terminals Curve fitting is performed on the crosstalk amplitude test results corresponding to different distances and a fitting formula is obtained. According to the requirements of the crosstalk amplitude index, the distance between the corresponding signal input terminals is calculated using the obtained fitting formula. Because the present invention uses an ADC design to improve the integration of three-dimensional acceleration, the design area of ​​the chip has been reduced; simultaneously according to the crosstalk model circuit fitting diagram of the present invention, the optimal distance between signal input terminals can be determined quickly, improving the circuit design efficiency.

Description

An ADC multi-input signal crosstalk model circuit technical field [0001] The present invention relates to the field of signal crosstalk, in particular to a multi-input signal crosstalk model circuit of an ADC. Background technique Accelerometer is an inertial sensor that measures acceleration, which is widely used in spacecraft navigation, missile guidance, automobile Autopilot, etc. An analog-to-digital converter (ADC) is a device that converts an analog signal into a digital signal. play a very important role in the calculation. Three-dimensional accelerometers typically use three analog-to-digital converters (ADCs) for each dimension. The acceleration signal is sampled and then converted into a digital signal. Since the use of three ADCs will occupy a large chip area, It is not conducive to the integration of three-dimensional accelerometers, so one ADC is used to measure the three-dimensional acceleration signals in different time periods. Sampling can save ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/12
CPCH03M1/12
Inventor 李荣宽谭杰吕瑞伟
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA