About: http://webisa.webdatacommons.org/286751479

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	A series of first differentiator circuits, 3033, 3034, 3035, provide first differential signals F'1, F'2, F'3 of the transform signals F1, F2, F3, with respect to time, or with respect to another factor, such as frequency.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com