Perhaps the two most noticeable areas of extended device performance are in power handling and speed. At one time, op amps were considered to be suitable for use below 1 MHz. Today it is possible to find high-speed devices designed for applications such as video where bandwidths are measured in the tens of MHz. In the area of power, the general-purpose op amp typically operates from a $$\pm$$15 V supply and can produce output currents in the neighborhood of 25 milliamps. New devices can produce output currents measured in amperes, while other devices can produce signals in the hundreds of volts. This makes it possible to directly connect lowimpedance loads to the op amp, which is a very useful commodity.