Operational amplifier symbol
Also called Op amp, Opamp, Amplifier
A high gain amplifier with an inverting (−) and a non-inverting (+) input and one output.
ANSI / IEEE
IEC 60617What the operational amplifier symbol means
A high gain amplifier with an inverting (−) and a non-inverting (+) input and one output.
ANSI and IEC symbols
Where you see it
Signal conditioning for 4 to 20 mA and sensor inputs, comparators, filters and buffers.
Related symbols
Frequently asked questions
What does the operational amplifier symbol look like?
On ANSI drawings: A triangle pointing to the output, with − and + inputs. In IEC 60617: A rectangle with a small triangle and ∞ for the gain.
Is the operational amplifier symbol the same in IEC and ANSI?
No. A rectangle with a small triangle and ∞ for the gain.
Where is a operational amplifier used?
Signal conditioning for 4 to 20 mA and sensor inputs, comparators, filters and buffers.
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