About: http://webisa.webdatacommons.org/227126436

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 variety of wave forms, other than saw-tooth, such as square, and triangular shown in FIGS. 9b and 9c and many other waveforms can be easily generated using electronic circuits well known to the art.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk