Application Cases

Experiment Name: Application of High-Voltage Amplifiers in Physical Reservoir Computing for Ferromagnetic-Ferroelectric Heterostructure Systems

Experimental Content:
An arbitrary waveform generated by a signal generator was amplified by a high-voltage amplifier and input into the system. The real-time output of the system was detected, and model training and testing for reservoir computing were conducted on this system.

Research Direction: Low-Power Spintronic Materials and Devices

Testing Equipment:
Signal generator, ATA-7010 high-voltage amplifier, current source, nanovoltmeter, digital multimeter, etc.

Experimental Procedure:
In this experiment, a Hall bar device composed of a magnetic multilayer film was fabricated on a piezoelectric substrate using micro-nanofabrication techniques. Subsequently, through a transition circuit board, the time-series signal was input into the system (as shown in the "Input" section) using a signal generator and a high-voltage amplifier, while the Hall voltage of the device was read as the signal output (as shown in the "Output" section). By collecting synchronized input and output signals using instruments and conducting model training, prediction of time-series signals was achieved.

The specific experimental setup is illustrated in Figure . The signal generated by the signal generator was input into the high-voltage amplifier to produce the high electric field required for the experiment, which was then applied to the sample. A series of test source meters were used to collect the output signals and synchronized actual input signals. LabVIEW software was programmed to read the measurement results from the instruments on a computer for subsequent experimental data analysis.

Experimental Results:
In the Mackey-Glass chaotic time-series prediction task, a pre-set arbitrary waveform (≤ ±4 V) generated by a signal generator was amplified 100–200 times by the high-voltage amplifier and input into the test system. A total of 250,000 data points (2500 × 50 × 2) were continuously collected. The test results confirmed that the signal amplification factor and signal accuracy met the experimental requirements. As shown in Figure a, after long-term testing, both the input signal (gray) and output signal (red) remained relatively stable. Figure b provides a detailed view of the data within the blue box in Figure a.

Recommended Power Amplifier: ATA-7010

Figure: Specifications of the ATA-7010 High-Voltage Amplifier