Alternating current transmission characteristic detection circuit
A detection circuit and AC transmission technology, applied in the measurement of electrical variables, resistance/reactance/impedance, measurement devices, etc., can solve the problems of complex hardware circuits, low algorithm accuracy, and many sampling points, etc., to achieve simple hardware circuits, Accurate algorithm and fewer sampling points
Active Publication Date: 2020-10-02
上海巨微集成电路有限公司
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Problems solved by technology
[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a detection circuit for AC transmission characteristics, which is used to solve the problem of complex hardware circuits in the existing detection circuit. , There are many sampling points and the algorithm accuracy is not high
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[0038] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.
[0039] see Figure 1 to Figure 3 . It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic concept of the present invention, although only the components related to the present invention are shown in the diagrams rather than the number, shape and Dimensional drawing, the shape, quantity and proportion of each component can be changed arbitrarily during actual implementation, and ...
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The invention provides an alternating current transmission characteristic detection circuit. The detection circuit comprises a reference clock generator, a demodulation clock generator connected to the output end of the reference clock generator, an excitation signal generator connected to the output end of the reference clock generator, an external sensor connected to the output end of the excitation signal generator, a serial demodulation module connected to the output end of the demodulation clock generator and the output end of the external sensor, an analog-to-digital conversion module connected to the output end of the serial demodulation module, and an operation module connected to the output end of the analog-to-digital conversion module. The problems of complex hardware circuit, many sampling points and low algorithm precision of the existing detection circuit are solved.
Description
technical field [0001] The invention relates to the field of integrated circuit design, in particular to an AC transmission characteristic detection circuit. Background technique [0002] The output characteristics of many sensors exhibit resistance / reactance characteristics under the excitation of AC voltage / current. Inputting an AC sine wave to the sensor and detecting the phase and amplitude of the output sine wave is a method often used in signal detection. The AC resistance characteristics of the sensor can be obtained by performing corresponding algorithms on the phase and amplitude of the detected output sine wave. [0003] There are many specific implementation circuits for characterizing the AC resistance characteristics of sensing elements through phase and amplitude, but most of them have the problems of complex hardware circuits, many sampling points and low algorithm accuracy. Contents of the invention [0004] In view of the above-mentioned shortcomings of t...
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IPC IPC(8): G01R27/02
CPCG01R27/02
Inventor 许刚
Owner 上海巨微集成电路有限公司