3[3]Fisk,Michael L.Automatic calibration of test equipment[A].Proceedings of the IEEE Systems Readiness Technology Conference[C].San Antonio TX USA:Publ by IEEE Piscataway N J USA,1993.677-680.
4[4]Husain,Rahat.Precise calibration of a standard resistor with one reference standard[J].Measurement,1993,11(2):173-177.
5[5]Glaser,John S.A simple low-loss linear negative resistor emulator[A].IEEE Annual Power Electronics Specialists Conference[C].Cairns Australia: Institute of Electrical and Electronics Engineers Inc,2002,(1):173-178.