Title :
A 1V 420μW 32-channel Cortical Signal Interface
Author :
Lee, Edward K F ; Matei, Eusebiu ; Lam, Anthony ; Li, Taihu
Author_Institution :
Alfred Mann Found., Santa Clarita, CA
Abstract :
AA 32-channel cortical signal interface with a 10-bit, 960kS/s ADC was designed to connect to a 121 microelectrode array. The 3.3-4V battery voltage was down converted to 1.0-1.3V so that the amplifier biasing currents could be maximized to achieve low noise. Native transistors and chopper stabilization were used to further reduce the overall noise and offset. For each channel, a minimum input referred noise under 1.5μVrms was achieved with a maximum power consumption of ~13μW.
Keywords :
CMOS integrated circuits; amplifiers; analogue-digital conversion; biomedical electrodes; microelectrodes; 1.0 to 1.3 V; 10 bit; 3.3 to 4 V; 420 muW; CMOS process; analog-digital converters; chopper stabilization; cortical signal interface; microelectrode array; Batteries; Capacitors; Centralized control; DC-DC power converters; Electrodes; Leakage current; Microelectrodes; Signal design; Switches; Voltage;
Conference_Titel :
Custom Integrated Circuits Conference, 2006. CICC '06. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
1-4244-0075-9
Electronic_ISBN :
1-4244-0076-7
DOI :
10.1109/CICC.2006.320858
