The output impedance of op-amps is typically very low, often in the range of hundreds of ohms, which is advantageous for driving large loads like speakers or motors. This low impedance is primarily achieved through the use of negative feedback, which compensates for load variations and stabilizes the output. Additionally, the output stage of op-amps often includes large transistors that can source significant current, contributing to their low output impedance. The design of op-amps, such as the 741 model, illustrates this with transistors connected through low resistances to enhance performance. Overall, the low output impedance is a fundamental characteristic that allows op-amps to effectively amplify signals.
