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With the potential difference between the source and the drain kept small (VDS is small), the MOSFET behaves as a resistance whose value varies __________ with the overdrive voltage(a) Linearly(b) Inversely(c) Exponentially(d) LogarithmicallyI had been asked this question in an online interview.Question is taken from MOSFETs Device Strucuture and Physical Operation in section MOS Field Effect Transistors (MOSFETs) of Electronic Devices & Circuits |
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Answer» RIGHT OPTION is (b) Inversely Best explanation: For small VDS, resistance r is GIVEN by R = 1 / ((μn Cox)(w/l)(VOV)). |
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