The AD826 is a low cost, wide band, high performance dualoperational amplifier which can drive heavy capacitive andresistive loads. It also achieves a constant slew rate, bandwidthand settling time over its entire specified temperature range.The AD826 (Figure 35) consists of a degenerated NPN differentialpair driving matched PNPs in a folded-cascode gain stage.The output buffer stage employs emitter followers in a class ABamplifier which delivers the necessary current to the load whilemaintaining low levels of distortion.