System and method for collecting high-performance brain electrical signals

The invention relates to the technical field of signal collection and analysis, in particular to a system and method for collecting high-performance brain electrical signals. The system for collecting the high-performance brain electrical signals comprises a shell and a circular board arranged in the shell. The circuit board comprises an ADS1298 analog-digital conversion chip, an Altera FPGA chip, a brain electrode, an upper computer, a preprocessing circuit, a DM9000A Ethernet interface chip, a right-leg driving electrode and an SDRAM. The brain electrode is connected with the preprocessing circuit and the preprocessing circuit is connected with the ADS1298 analog-digital conversion chip. The ADS1298 analog-digital conversion chip is connected with the Altera FPGA chip. The output end of the ADS1298 analog-digital conversion chip is connected with the right-leg driving electrode. The Altera FPGA chip is connected with the upper computer through the DM9000A Ethernet interface chip. The SDRAM is connected with the Altera FPGA chip. The system is simple in hardware structure, low in power consumption, convenient to carry, high in accuracy, safe and reliable in data transmission, short in product development period and convenient to popularize and apply.