E. Raisanen-Ruotsalainen, K. Lasanen, J. Kostamovaara
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A 1.2 V micropower CMOS op amp with floating-gate input transistors
A micropower 1.2 V op amp has been integrated in a 0.35 /spl mu/m CMOS process. Floating-gate input transistors are used to increase the input common mode voltage range of the op amp. Measured dc gain of the op amp is 65 dB. With a 9 pF load unity gain bandwidth is 230 kHz and phase margin is 62/spl deg/. Input referred noise is 0.5 /spl mu/V//spl radic/(Hz) at 10 Hz and 0.15 /spl mu/V/(Hz) at 10 kHz. Current consumption of the op amp is 4.3 /spl mu/A and active area is 0.11 mm/sup 2/.
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