About: http://webisa.webdatacommons.org/237228086

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	FIG. 2a is a schematic circuit diagram of the variable current sources 108 and 128, each of which includes opamp 202 with positive input connected to reference voltage Vref and negative input connected to node 204.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com