ANALOG FRONT-END INTEGRATED CIRCUIT FOR RECORDING CRANIAL NERVE SIGNAL

摘要

According to the present technology, an analog front-end integrated circuit for recording cranial nerve signals is disclosed. According to a specific example of the present technology, neural amplifiers can be designed as complementary cascode input-based operational amplifiers to suppress input noise, and a variable gain amplifier is designed as a current mirror-based operational amplifier to adjust a gain in a set frequency band in consideration of margins including both a high-pass cutoff frequency and a low-pass cutoff frequency. The channel selection and initial reset time are controlled by a clock signal generated based on a channel selection signal supplied from the outside and power supply for channels that are not selected is stopped to record cranial nerve signals with ultra-low power low noise. The neural amplifier, the variable gain amplifier, and a control circuit are implemented in one chip using only one CMOS process, thereby improving the performance index of the analog front-end integrated circuit while displaying the high-resolution cranial nerve signals.;COPYRIGHT KIPO 2020