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In this paper, a low voltage low power rail to rail class-AB OTA in standard CMOS technology is proposed. The architecture is based on current mirror OTA topology with a local feedback between the output nodes of the first stage. The negative resistance load (NRL) is employed for compensation parasitic resistance of the first stage and the DC gain of the proposed OTA is enhanced. Compared to conventional...
A positive feedback technique that make possible the operation of operational transconductance amplifier (OTA) with very low supply voltage, down to 0.5V, is proposed. The MOSFETs providing quasi-linear temperature characteristic are used along with the proposed OTA to design a low voltage bandgap reference circuit. The 0.045-mm2 chip fabricated in SMIC 0.18-mum CMOS process generates 0.4V reference...
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