op amp formula symbol identification

Thread Starter

minkey01

Joined Jul 23, 2014
185
hello.

does anyone know what these double lines are in this formula: || ?

and how to calculate with them?

R1||R2||R3

Thanks!

op amp formula.jpg
 

MrChips

Joined Oct 2, 2009
30,618
Double lines mean "in parallel with".

R1||R2 means that you add the conductance of R1 with the conductance of R2.
The total conductance of R1||R2 is 1/R1 + 1/R2.
 
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