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Circuit stability compensation method

A compensation method and circuit stabilization technology, applied in the field of circuit stability compensation for compensating impedance measurement circuit phase, to achieve the effect of maintaining accuracy and stability

Inactive Publication Date: 2014-07-30
CHROMA ATE
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Problems solved by technology

[0005] The purpose of the present invention is to provide a circuit stability compensation method, so that the impedance measurement device can calculate the phase offset of the feedback circuit in the impedance measurement device when performing high-frequency impedance measurement, and solve the problem of high-frequency measurement through phase compensation. Measurement Accuracy and Stability Issues

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Embodiment Construction

[0029] Please also refer to Figure 1A as well as Figure 1B . Figure 1A It is a functional block diagram of the impedance measuring device of the present invention. The circuit stability compensation method of the present invention is used to calibrate the impedance measuring device 2, and the impedance measuring device 2 has at least one feedback circuit. The flow and corresponding components of the circuit stability compensation method of the present invention are described below.

[0030] Such as Figure 1A As shown, the impedance measurement device 2 is a four-wire measurement carrier, so that the object carrier 60 is respectively connected with the measurement cable 20 , the measurement cable 30 , the measurement cable 40 and the measurement cable 50 . Wherein, the resistance 21, the current loop switcher 22 and the signal source 23 are connected to the first end 61 of the object carrier 60 through the measurement cable 20, and the current loop switcher 22 is used to s...

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Abstract

The invention discloses a circuit stability compensation method which is used to calibrate an impedance measurement device possessing a feedback circuit. The circuit stability compensation method comprises the following steps: providing first standard impedance so as to execute a first measuring program; providing second standard impedance so as to execute second measuring program; calculating one phase shift of the feedback circuit through measuring results of the first measuring program and the second measuring program; executing a calibration program based on the phase shift, wherein the calibration program adjusts the frequency response characteristic of the impedance measurement device. Thereby, by using the method of the invention, the impedance measurement device is not restricted by the feedback circuit and a test cable.

Description

technical field [0001] The invention relates to a circuit stability compensation method, and in particular to a circuit stability compensation method for calculating the feedback circuit characteristics of an impedance measurement circuit and compensating the phase of the impedance measurement circuit. Background technique [0002] Generally speaking, in the impedance measurement module, the components are connected to each other by cables, but during the transmission of the measurement signals, the cables often cause the phase difference of the measurement signals, resulting in errors in the impedance measurement results . Therefore, when the traditional impedance measurement module uses four-terminal pairs to perform impedance measurement in the low frequency range, a calibration procedure is required. For example, Hideki mentioned the traditional method of impedance measurement in US Pat. No. 6,054,867. Wherein, Hideki pointed out that in the impedance measurement, at l...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/02
Inventor 王遵义黄桂霖
Owner CHROMA ATE
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