Analogue signal isolator
An analog signal and isolator technology, applied in the electrical field, can solve problems such as the influence of high-frequency signals and interference signals, and achieve the effect of improving reliability and signal accuracy
Inactive Publication Date: 2011-06-29
SHANGHAI UPUN ELECTRIC GRP
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Problems solved by technology
[0003] The purpose of the present invention is to provide an analog signal isolator, which solves the technical problem that the analog signal isolator in the prior art is easily affected by high-frequency signals and interference signals at industrial sites
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Embodiment 1
[0012] Such as figure 1 with figure 2 As shown, an analog signal isolator of the present invention consists of a signal input circuit 1, an anti-interference circuit 2, a signal amplification circuit 3, a photoelectric isolation circuit 4, a signal restoration circuit 5, a signal amplification and adjustment circuit 6, an output circuit 7 and A power supply circuit 8 is formed, wherein the signal input circuit 1 is connected to the anti-jamming circuit 2, the anti-jamming circuit 2 is connected to the signal amplifying circuit 3, and the signal amplifying circuit 3 is connected to the photoelectric isolation circuit 4 connected, the photoelectric isolation circuit 4 is connected to the signal restoration circuit 5, the signal restoration circuit 5 is connected to the signal amplification and adjustment circuit 6, the signal amplification and adjustment circuit 6 is connected to the output circuit 7, and the The power supply circuit 8 is connected with the signal amplifying c...
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The invention discloses an analogue signal isolator. The analogue signal isolator comprises a signal input circuit, an anti-interference circuit, a signal amplification circuit, a photoelectric isolation circuit, a signal reduction circuit, a signal amplification and regulation circuit, an output circuit and a power supply circuit, wherein the signal input circuit is connected with the anti-interference circuit; the anti-interference circuit is connected with the signal amplification circuit; the signal amplification circuit is connected with the photoelectric isolation circuit; the photoelectric isolation circuit is connected with the signal reduction circuit; the signal reduction circuit is connected with the signal amplification and regulation circuit; the signal amplification and regulation circuit is connected with the output circuit; the power supply circuit consists of two independent power supply circuits, wherein one power supply circuit is connected with the signal amplification circuit and the photoelectric isolation circuit; the other power supply circuit is connected with the signal reduction circuit, the signal amplification and regulation circuit and the output circuit; the anti-interference circuit inhibits high-frequency and field interference signals in input signals; the photoelectric isolation circuit isolates an input circuit from the output circuit; therefore, the reliability, the stability and the output accuracy are improved.
Description
Technical field: [0001] The invention relates to the field of electricity, in particular to an isolation circuit, in particular to an analog signal isolator. Background technique: [0002] Signal isolators are widely used in industrial control appliances to protect equipment. In the prior art, the analog signal isolator uses a photoelectric isolator to isolate the input circuit from the output circuit. However, high-frequency signals and interference signals in the industrial field often affect the waveform of the analog signal, so the accuracy of the analog signal isolator is not high. Invention content: [0003] The purpose of the present invention is to provide an analog signal isolator, which solves the technical problem in the prior art that the analog signal isolator is easily affected by high-frequency signals and interference signals at industrial sites. [0004] The analog signal isolator of the present invention is composed of a signal input circuit, an anti-int...
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IPC IPC(8): H03K19/14G08C19/00
Inventor 王国良赵建余
Owner SHANGHAI UPUN ELECTRIC GRP