A 1-V 5 /spl mu/W CMOS-opamp with bulk-driven input transistors
暂无分享,去创建一个
In this paper, a low-power CMOS operational amplifier for biomedical instrumentation operating with a 1-V supply is described. Large input common-mode range (CMR) is achieved utilizing bulk-driven PMOS-transistors as an input differential pair of the opamp. The opamp was fabricated in a 0.35 /spl mu/m n-well double-poly CMOS process with threshold voltages of 0.5 V and 0.65 V. The open-loop gain (A/sub 0/) of the amplifier is 70 dB, the gain-bandwidth product (GBW) is 190 kHz and the phase margin (PM) is 60/spl deg/ with a 7 pF load. The power consumption of the opamp is 5 /spl mu/W.
[1] Chenming Hu,et al. Future CMOS scaling and reliability , 1993, Proc. IEEE.
[2] J. Kostamovaara,et al. A 1.2 V micropower CMOS op amp with floating-gate input transistors , 2000, Proceedings of the 43rd IEEE Midwest Symposium on Circuits and Systems (Cat.No.CH37144).
[3] Tadashi Shibata,et al. A functional MOS transistor featuring gate-level weighted sum and threshold operations , 1992 .
[4] Gabriel A. Rincon-Mora,et al. Designing 1-V op amps using standard digital CMOS technology , 1998 .