About: http://webisa.webdatacommons.org/312794862

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	The reference signal is an analog signal which may be produced via digital-to-analog converter (34) which converts a digital input command into a corresponding analog signal Vref.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com