Dual op amp, LDO regulator with power supply gain suppression for CMOS smart sensors and microsystems

In CMOS smart sensors and microsystems it can be very convenient to integrate both analog and digital circuits in the same chip; since the supply voltage for high-accuracy, high- precision interfaces should be as immune from disturbances as possible, low drop out regulators are often necessary. Here we show a CMOS, dual op amp, fast, low drop out regulator which allows to diminish the power supply gain by orders of magnitude up to very high frequencies.