Influence of the Output Resistance of Measurement System to I-V Characteristics of Gunn Diodes
Edward V. Semyonov, O. Yu. Malakhovskij · 2018 XIV International Scientific-Technical Conference on Actual Problems of Electronics Instrument Engineering (APEIE) · 2018
It is noted that there are significant distortions in the measured current-voltage characteristics of Gunn diodes presented in the literature: self-heating effects and/or smoothing of the discontinuity in the current-voltage characteristic. It is indicated that the self-heating effects are eliminated at the short-pulse measurement of the I-V characteristics, but such measuring systems, as a rule, have an output resistance that comparable (or greater) to the resistance of a Gunn diode. It is shown that an increased output resistance of the measuring system leads to a smoothing of the discontinuity in the I-V curve. A requirement for the output impedance of the meter based on the permissible distortion of the I-V characteristics is establish.