| 摘要 |
An ultra-low voltage rail-to-rail operational transconductance amplifier (OTA) is based on a standard digital 0.18 mum CMOS process. Techniques for designing a 0.8 volt fully differential OTA include bias and reference current generator circuits. To achieve rail-to-rail operation, complementary input differential pairs are used, where the bulk-driven technique is applied to reduce the threshold limitation of the MOSFET transistors. The OTA gain is increased by using auxiliary gain boosting amplifiers.
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