A 0.5-V bulk-input fully differential operational transconductance amplifier

We present a fully differential two-stage Miller op-amp operating from a 0.5 V power supply. The input signal is applied to the bulk nodes of the input devices. A prototype was designed in a standard 0.18 /spl mu/m CMOS process using standard 0.5 V V/sub T/ devices. It has a measured 52 dB DC gain, a 2.5 MHz gain-bandwidth and consumes 110 /spl mu/W.

[1]  H. Yoshizawa,et al.  A 0.9-V 0.5-μA rail-to-rail CMOS operational amplifier , 2001, IEEE J. Solid State Circuits.

[2]  Torsten Lehmann,et al.  1-V power supply CMOS cascode amplifier , 2001 .

[3]  Hirokazu Yoshizawa,et al.  A 0.9 V, 0.51 /spl mu/A rail-to-rail CMOS operational amplifier , 2001, Proceedings of the IEEE 2001 Custom Integrated Circuits Conference (Cat. No.01CH37169).

[4]  W. Sansen,et al.  A 900-mV low-power ΔΣ A/D converter with 77-dB dynamic range , 1998, IEEE J. Solid State Circuits.

[5]  Hirokazu Yoshizawa,et al.  A 0.9V, 0.5pA Rail-to-Rail CMOS Operational Amplifier , 2001 .

[6]  G. Ferri,et al.  A 1.3 V op/amp in standard 0.7 /spl mu/m CMOS with constant g/sub m/ and rail-to-rail input and output stages , 1996, 1996 IEEE International Solid-State Circuits Conference. Digest of TEchnical Papers, ISSCC.

[7]  Tzuen-Hsi Huang,et al.  Back-gate forward bias method for low-voltage CMOS digital circuits , 1996 .

[8]  J. Kostamovaara,et al.  A 1-V 5 /spl mu/W CMOS-opamp with bulk-driven input transistors , 2000, Proceedings of the 43rd IEEE Midwest Symposium on Circuits and Systems (Cat.No.CH37144).

[9]  Gabriel A. Rincon-Mora,et al.  Designing 1-V op amps using standard digital CMOS technology , 1998 .