Difference amplifier — Free Electronics Illustration

Electronics

Difference amplifier

Clean black-line textbook schematic of a classic op-amp difference amplifier. A right-pointing triangular operational amplifier is centered, with two separate left-side input terminals feeding the noninverting (+) and inverting (-) inputs through resistor networks. Four resistors are arranged in the standard matched differential-amplifier configuration: two input resistors feed the two op-amp inputs, while two additional resistors form the feedback path on the inverting side and the reference/divider network on the noninverting side. The layout is compact and roughly symmetrical, with standard zigzag resistor symbols, straight connection leads, clear plus and minus input markings, and a single output node on the right, visually emphasizing subtraction of one input voltage from the other.

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