Low voltage techniques [for micropower operational amplifiers]

A micropower operational amplifier is described that will operate from a total supply voltage of 1.1 V. The complementary class-B output can swing within 10 mV of the supplies or deliver ±20 mA with 0.4 V saturation. Common mode range includes V/SUP -/, facilitating single-supply operation. Otherwise, DC performance compares favourably with that of the LM108. An adjustable-output voltage reference is also presented that uses a new technique to eliminate the bow usually found in the temperature characteristics of the band-gap reference. Minimum supply is 1 V, and typical drift is 0.002 percent/°C.