AU provides expertise in microelectronics and integrated circuits (IC) design and implementation. Their paper presents a 4-channel analog front-end comprising of the input buffers, capacitive coupled chopper-stabilized amplifier, and programmable gain amplifier.

The input buffer ensures an ultra-high input impedance of 53GΩ@DC to tolerate high electrode-tissue impedance mismatch. The output impedance of the buffers is optimized to reduce the effect of multi-channel on CMRR. The amplifier consumes 4.3μW/ch while operating with low input-referred noise at 0.77μVrms and 1.75μVrms over 2Hz-200Hz and 200Hz-2.4kHz, respectively.

The IEEE Custom Integrated Circuits Conference is a premier conference devoted to IC development. The conference sessions present original first published technical work and innovative circuit techniques that tackle practical problems. CICC is the conference to find out how to solve design problems, improve circuit design techniques, get exposure to new technology areas, and network with peers, authors and industry experts.

In particular, the Amplifier Techniques session showcased recent advances in amplifier techniques for biopotential sensing, covering many aspects such as electrode offset cancellation, area efficiency and ultra-high input impedance.

CICC2021 Conference / Program