Abstract
A new bipolar four-quadrant operational amplifier operating at a power supply voltage of 0.8 V and with a supply current of 800 μA is here presented and illustrated. It features low input offset, low bias current, low noise, low crossover distortion and a rail-to-rail output swing. Control circuits ensuring minimum and maximum current limits for the output transistors have been incorporated. The biasing circuitry follows a PTAT scheme. A simple compensation topology allows the reduction of the area. The chip, whose area is about 2 mm2, has been fabricated in HF2CMOS 2 μ/6 GHz technology. Finally, Spice simulations and experimental results, which confirm the expected overall performances of the low voltage op-amp, are reported.
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Ferri, G., Faccio, M., Stochino, G. et al. A Very Low Voltage Bipolar Op-Amp for Sensor Applications. Analog Integrated Circuits and Signal Processing 20, 11–23 (1999). https://doi.org/10.1023/A:1008358910923
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DOI: https://doi.org/10.1023/A:1008358910923