cliparts/b/1/c/4/clipart-rsa-iec-opamp-symbol-b1c4.svg image/svg+xml Open Clip Art Library RSA IEC Opamp Symbol 2008-09-06T11:08:31 Amplifier with two inputs. Can be used to indicate opamps. http://openclipart.org/detail/19104/rsa-iec-opamp-symbol-by-rsamurti rsamurti circuit circuit clip art clipart iec iec image media public domain svg symbol symbol