Real-time integrator drifting compensation alternation-type integrator and error control method thereof

A drift compensation and integrator technology, applied in the field of integrators, can solve problems such as nonlinear error op amp saturation, capacitor leakage error, etc.

Active Publication Date: 2013-07-10
HEFEI UNIV OF TECH
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Problems solved by technology

[0024] The present invention aims at the deficiencies of the above-mentioned prior art, and provides a real-time integral drift compensation alternate integrator, which is based on a field programmable gate a

Method used

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  • Real-time integrator drifting compensation alternation-type integrator and error control method thereof
  • Real-time integrator drifting compensation alternation-type integrator and error control method thereof
  • Real-time integrator drifting compensation alternation-type integrator and error control method thereof

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Embodiment Construction

[0047] see figure 1 , 2 , 3, 4.

[0048] Integral unit A and integral unit B use real-time integral drift compensation integrators, and their specific circuits refer to figure 2 . The input signal is input to the inverting input terminal of the operational amplifier in integrator a, the inverting input terminal of the operational amplifier in integrator b is connected to the reference ground, and the non-inverting input terminal of the operational amplifier in integrator a and integrator b is grounded, The output terminals of the operational amplifiers in integrator a and integrator b are respectively connected to the non-inverting terminals of the first and second operational amplifiers of the instrumentation amplifier. That is, the integrator a integrates the input signal, the integrator b integrates the signal ground, and the instrumentation amplifier completes the subtraction of the output signals of the integrator a and the integrator b.

[0049] Switch module C and ...

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Abstract

The invention discloses a real-time integrator drifting compensation alternation-type integrator and an error control method of the real-time integrator drifting compensation alternation-type integrator. The integrator comprises real-time compensation-type integral units, a field-programmable gate array (FPGA) module, switch modules, an analog-digital converter (ADC) module and a digital-analog converter (DAC) module. Real-time integrator drifting compensation-type integrator bodies are adopted for the real-time compensation-type integral units, two-way single-pole double-throw switches are adopted for the switch modules, the two real-time compensation-type integral units carry out alternate integration on differential signals at different time periods, signals output by the integral units are converted into digital signals through the ADC, the digital signals are kept and accumulated in the FGPA, the integral signal splicing is completed, and finally the integral signals are converted into analog signals through the DAC for being output. According to the real-time integrator drifting compensation-type alternation-type integrator, the problems that for an analog integrator, a zero drift, capacitance leakage errors, non-linear errors and operational amplifier saturation exist can be solved.

Description

technical field [0001] The invention relates to the field of integrators, in particular to a real-time integral drift compensation alternating integrator with a working time of up to 1000s and an error control method thereof. Background technique [0002] An electronic integrator is an electronic device that can make the output value at any time equal to the sum of all input values ​​of the input signal before that time, and is used in many occasions. In the tokmak experiment, the principle of magnetic induction is usually used to measure the magnetic field and flux inside the device, so an integrator is needed to integrate the differential signals output by the magnetic probe, the Roco coil and the single-turn ring, so as to realize the plasma Diagnostics and configuration control. usually used as figure 1 As shown in the analog integrator, its integral error mainly includes zero drift, capacitance leakage error and nonlinear error. where, due to the input offset voltage...

Claims

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Application Information

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IPC IPC(8): H03K19/00
Inventor 刘冬梅万宝年陈波赵卫忠
Owner HEFEI UNIV OF TECH
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