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Signal generator power amplifier driving piezoelectric ceramic application test program

发布:2021-04-26

When measuring the amplitude characteristics, frequency characteristics, transmission characteristics and other electrical parameters of various telecommunication systems or telecommunication equipment, and when measuring the characteristics and parameters of components, signal generators are used as test signal sources or excitation sources, but generally Whether the function signal generator is imported or domestic, the maximum voltage output is 10Vpp-20Vpp, and the current output is very small. The user is doing a lot of tests because the voltage and power are not enough. The power amplifier needs to be used as the driving amplifier part to match the signal source. Come to work.

Aigtek power amplifier has a complete output protection circuit (output over-current, over-voltage protection) from the consideration of equipment compatibility and operational interoperability. It can be equipped with signal generators of any brand and model, and can be connected to quickly build experimental tests. The platform can flexibly control the output voltage and power, the maximum output is 18A, the voltage is 1600Vpp, and the frequency range is DC-24MHz.

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Both power amplifiers and signal generators need to have high-performance and high-quality output waveforms: on the one hand, it has good stable performance, low output waveform distortion, and the signal generator needs to be able to generate a variety of waveform signals; on the other hand, it is good Dynamic performance, convenient amplitude and frequency modulation, and good load adaptability. In addition, some tests require power output in addition to the signal generator to provide the output voltage.

The piezoelectric ceramic drive method is generally an excited oscillation drive, using a sine wave oscillator to excite sound. The piezoelectric ceramic chip that a laboratory needs to drive mainly works at a frequency of 200KHz, and the voltage needs to be about 400V. Antai technical engineers provide a signal generator + power amplifier test program.

The recommended signal generators and amplifiers are Tektronix AFG3000 series and ATA-2081 high-voltage amplifiers. The output voltage range of the signal generator is only 10Vp-p. When connected to the power amplifier ATA-2081, the output voltage reaches 800Vpp, the maximum power is 16W, and the frequency range is DC-500KHz, fully meets the driving test requirements, and can directly drive piezoelectric ceramics.

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The impedance of the load connected to the general voltage amplifier is relatively large, so the output current is relatively small, and after the multiplication, the power is not large. The power amplifier will add a power tube with a larger working current at the end of the voltage amplification, so that it can not only connect to a load with a large impedance (this time is the same as the voltage amplification), but also to a load with a smaller impedance. In this way, the output current will increase due to the decrease of the load impedance, while the voltage can remain unchanged, and the power will increase. Common power amplifier applications include: electronic teaching experiments, ultrasonic flaw detection, EMC signal filling, pressure Driving of electrical components, measurement of magnetization characteristics (BH curve) of magnetic materials, etc.

Xi'an Antai Electronic Technology Co., Ltd. (Aigtek) is a leading domestic high-tech enterprise engaged in the research and development, production and sales of measuring instruments. Focusing on the research and development of high-voltage amplifiers, power amplifiers, measurement calibration products, wiring harness testers and other products, breaking the western technology monopoly and blockade, the products are widely used in the fields of defense, aviation, aerospace and chip research, serving more than 1,000 scientific research institutions worldwide , To help global scientific and technological progress.

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