Shulou(Shulou.com)11/24 Report--

CTOnews.com April 2 news, CTOnews.com learned from the General Administration of Market Supervision that recently, the General Administration of Market Supervision released new capacitance reference devices and inductance reference devices to upgrade the source of precision measurement of high-end electronic components, better support the upgrading of China's electronic components manufacturing industry, and promote the high-quality development of the power, electronics and communications industries.

▲ capacitance reference device and inductance reference device, figure source "Shi Shuo Xinyu" Wechat official account capacitance, inductance and resistor are basic circuit components, which are widely used in power, electronics and communication fields. The manufacture, screening and industrialization of high-end electronic components are inseparable from the accurate measurement of capacitance and inductance. Various types of capacitors, resistors and inductors are widely used in consumer electronic products such as mobile phones, computers, household appliances, cars and so on.

The new capacitance reference device realizes the high accuracy reproduction of the capacitance unit through the real-time measurement and calculation of the axial length of the capacitor main electrode by the laser length measurement system, which overcomes the problem that the original capacitance reference device can not trace the axial length in real time. At the same time, it realizes the electrical compensation scheme put forward by our country to overcome the end effect, develops the capacitance transfer bridge independently, and extends the capacitance range from 10 pF to 100 pF. The ability to reproduce capacitive units is further improved.

The new inductance reference device adopts the Maxwell bridge method, which is more commonly used in the world, and independently develops the inductance reference transfer bridge and the transition standard inductor group, and reproduces the standard uncertainty of inductance value. it is increased from 5 μ H / H to 2 μ H / H.

The new capacitance reference device and inductance reference device reproduce the capacitance unit "Farah" and inductance unit "Henry" at a higher technical level. China's ability to reproduce the values of capacitance and inductance is at the international advanced level, which further improves China's influence and voice in the field of international electromagnetic impedance measurement.

The new capacitance reference device and inductance reference device can better meet the traceability needs of China's aerospace, microelectronics and other high-precision fields. The related key technologies can solve the problem of ultra-high precision differential displacement detection in superconducting gravimeters in the fields of earthquake monitoring and prediction, geological exploration, spacecraft launch and navigation. Among them, the capacitance detection sensitivity of the new capacitance reference device can reach 1 × 10-9 pF, which can realize the accurate measurement of sub-nanometer (A) micro-displacement, which is equivalent to 1/100000 of the displacement change of the diameter of a hair. At the same time, in the field of integrated circuits in the microelectronics industry, the new capacitance reference device can solve the problem of lack of traceability calibration of small capacitance in our country, and provide on-chip impedance standard and traceability basis for on-chip parameters and reliability testing of integrated circuits.

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