Impedance matching device for signal processing circuit of photomultiplier

A technology of signal processing circuit and photomultiplier tube, which is applied in the direction of instruments, scientific instruments, radiation measurement, etc., to achieve accurate measurement results, low input impedance, and improve the effect of analysis accuracy

Inactive Publication Date: 2010-05-05
泰州市华东分析仪器有限公司
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Problems solved by technology

[0003] The invention provides an impedance matcher for a photomultiplier tube signal processing circuit, which solves the impedance matching problem between the photomultiplier tube and the signal processing circuit, makes the measurement signal undistorted and noise-free, and ensures the accuracy of the measurement result

Method used

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  • Impedance matching device for signal processing circuit of photomultiplier
  • Impedance matching device for signal processing circuit of photomultiplier

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Embodiment Construction

[0009] according to figure 1 As shown, the impedance matcher used for the photomultiplier tube signal processing circuit, its input terminal is connected with the output terminal of the photomultiplier tube, and its output terminal is connected with the input terminal of the photomultiplier tube signal processing circuit, and the impedance The matcher includes two parts of current amplification and voltage amplification. The current amplifying part mainly includes a field effect transistor IC1, a capacitor C1 and a resistor R2, IC1 can be a field effect transistor of the type 3DG6. The grid of the field effect transistor IC1 is connected to the output terminal of the photomultiplier tube through the resistor R1, the grid is grounded through the capacitor C1, and the drain and the source of the field effect transistor IC1 are connected to the power supply voltage (±12V), so A resistor R2 is connected between the source and the negative voltage power supply to realize micro-cur...

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Abstract

The invention discloses an impedance matching device for a signal processing circuit of a photomultiplier. The input end of the impedance matching device is connected with the output end of the photomultiplier, and the output end of the impedance matching device is connected with the input end of the signal processing circuit of the photomultiplier. The impedance matching device comprises a current amplifying part and a voltage amplifying part. The impedance matching device of the invention solves the problem of impedance matching between the photomultiplier and the signal processing circuit, thus the measuring signal has no distortion and no noise, and the accuracy of the measuring result is ensured.

Description

technical field [0001] The invention relates to an impedance matching device used in a photomultiplier tube signal processing circuit. Background technique [0002] At present, the photomultiplier tube and its signal measurement processing circuit are directly connected, and there are two problems: 1. The impedance between the photomultiplier tube and the signal measurement processing circuit does not match, resulting in measurement signal distortion and noise increase, resulting in inaccurate measurement results, and finally 2. There is difficulty in zero adjustment, and the measurement signal easily enters the saturation region of the operational amplifier, resulting in serious distortion and attenuation of the measurement signal, and the instrument cannot enter the ideal working state. Contents of the invention [0003] The invention provides an impedance matching device for a signal processing circuit of a photomultiplier tube, which solves the problem of impedance mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/208
Inventor 朱宝华
Owner 泰州市华东分析仪器有限公司
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