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Explain the origin of finite output resistance of MOSFET devices?
Wiki User
∙ 13y ago
let the mosfet be biased in saturation regior.
thus drain current in independent of drain to sourse voltage,
the VI chara. is a curve, when this is extended till X axis at pt. Vds=-Va
this is similar to effect in transistor
the o/p resistance is slope of V-I chara.. it should ideally be infinite, but has some finite value due to "CHANNEL LENGTH MODULATION"
Wiki User
∙ 13y ago
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1 What is the effect caused by the ammeter resistance when an ammeter is inserted into a circuit to measure the current?
An ammeter has a finite resistance which is inserted in series with the rest of the circuit, increasing the total resistance and decreasing the current. A good ammeter has a very low resistance, so it shouldn't affect the circuit noticeably.
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