Title :
A 9-Bit configurable current source with enhanced output resistance for cochlear stimulators
Author :
Guo, Song ; Lee, Hoi ; Loizou, Philipos
Author_Institution :
Dept. of Electr. Eng., Univ. of Texas at Dallas, Richardson, TX
Abstract :
This paper presents a configurable current source for cochlear stimulators. A switchable multi-bias active-cascode architecture is developed to provide a 9-bit output current in a small implementation area. A stacking MOS structure enables the current source to achieve high output resistance and large voltage compliance. Implemented in a standard 0.35 mum CMOS process, the current source can source a maximum 1 mA current, provide ges4.77 V voltage compliance under a 5 V supply and achieve >50 MOmega output resistance in 0.26 mm2.
Keywords :
CMOS integrated circuits; biomedical electronics; cochlear implants; 9-bit configurable current source; CMOS; cochlear stimulators; enhanced output resistance; size 0.35 mum; stacking MOS structure; switchable multibias active-cascode architecture; voltage 5 V; word length 9 bit; Auditory system; Circuits; Cochlear implants; Electric resistance; Electrodes; Pulse generation; Space vector pulse width modulation; Stacking; Video recording; Voltage;
Conference_Titel :
Custom Integrated Circuits Conference, 2008. CICC 2008. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4244-2018-6
Electronic_ISBN :
978-1-4244-2019-3
DOI :
10.1109/CICC.2008.4672134
