Title :
A 0.9 V rail-to-rail constant g/sub m/ amplifier for implantable biomedical applications
Author :
Lee, Edward K F ; Matei, Eusebiu ; Ananth, Ravi
Author_Institution :
Alfred Mann Found., Santa Clarita, CA
Abstract :
A low power, low voltage rail-to-rail operational amplifier (opamp) was designed in a conventional 0.18mum CMOS process for implantable biomedical applications. The rail-to-rail constant gm input stage of the opamp utilizes both a native NMOS differential pair and a normal NMOS differential pair. Both differential pairs are operated in the subthreshold region. The gm variations in the overall input stage are within plusmn27 % and plusmn10 % for a supply voltage of 0.9 V and 1.0 V, respectively. The power dissipation of the entire opamp is 2.4 muW for a 0.9 V supply
Keywords :
CMOS integrated circuits; biomedical electronics; low-power electronics; operational amplifiers; prosthetics; 0.18 micron; 0.9 V; 1.0 V; 2.4 muW; CMOS process; implantable biomedical applications; native NMOS differential pair; normal NMOS differential pair; rail-to-rail constant amplifier; rail-to-rail operational amplifier; Batteries; Filters; Low voltage; MOS devices; MOSFETs; Power dissipation; Rail to rail amplifiers; Rail to rail inputs; Rail to rail operation; Rail to rail outputs;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1692670
