Some techniques for low-voltage continuous-time analog circuit operation

The drastic reduction in the supply voltages of CMOS VLSI systems driven by technological as well as power reduction constraints has forced analog designers to divert from conventional analog circuit architectures which become non-functional in a reduced supply environment and look for new techniques for low voltage, high performance operation of analog CMOS circuits. In this presentation a family of high performance low-voltage analog CMOS circuits is introduced. These are based on the utilization of static, dynamic and switched floating voltage sources. These circuits operate in all cases with a single supply voltage close to a transistor´s threshold voltage. Among the circuits discussed in this presentation we include: one and two stage class AB op-amps, rectifiers, filters, transconductors, analog multipliers, etc