Analog Electronics
MOSFET
Practice questions from MOSFET.
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IncorrectWhich one of the following statements is true about the small signal voltage gain of a MOSFET based single stage amplifier?
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Sign in to UnlockIn the circuit, is an ideal current source. The transistors and are assumed to be biased in saturation, wherein is the input signal and is fixed DC voltage. Both transistors have a small signal resistance of and trans-conductance of . The small signal output impedance of this circuit is
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Sign in to UnlockFor an ideal MOSFET biased in saturation, the magnitude of the small signal current gain for a common drain amplifier is
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Sign in to UnlockA common-source amplifier with a drain resistance, , is powered using a 10 V power supply. Assuming that the transconductance, gm is , the voltage gain of the amplifier is closest to:
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Sign in to UnlockThe cross-section of a metal-oxide-semiconductor structure is shown schematically. Starting from an uncharged condition, a bias of +3 V is applied to the gate contact with respect to the body contact. The charge inside the silicon dioxide layer is then measured to be +Q. The total charge contained within the dashed box shown, upon
application of bias, expressed as a multiple of Q (absolute value in Coulombs, rounded off to the nearest integer) is ___________.
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Sign in to UnlockGiven is the gate-source voltage, is the drain source voltage, and is the threshold voltage of an enhancement type NMOS transistor, the conditions for transistor to be biased in saturation are
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Sign in to UnlockThe enhancement type MOSFET in the circuit below operates according to the square law. , the threshold voltage is 500 mV. Ignore channel length modulation. The output voltage is
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Sign in to UnlockAssume that the N-channel MOSFET shown in Figure is ideal, and that its threshold voltage is +1.0V. The voltage between nodes a and b is:
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Sign in to UnlockThe charge distribution in a metal-dielectric-semiconductor specimen is shown in Figure. The negative charge density decreases linearly in the semiconductor as shown. The electric field distribution is as shown in
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Sign in to UnlockAssume that the threshold voltage of the N-channel MOSFET shown in Figure is +0.75V. The output characteristics of the MOSFET are also shown.
The transconductance of the MOSFET is:
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Sign in to UnlockAssume that the threshold voltage of the N-channel MOSFET shown in Figure is +0.75V. The output characteristics of the MOSFET are also shown.
The voltage gain of the amplifier is:
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Sign in to UnlockThe value of R for which the PMOS transistor in figure will be biased in linear region is
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Sign in to UnlockThe variation of drain current with gate-to-source voltage ( characteristic) of a MOSFET is shown in Figure. The MOSFET is
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Sign in to UnlockFor the n-channel enhancement MOSFET shown in Figure, the threshold voltage . The drain current of the MOSFET is 4 mA when the drain resistance is . If the value of is increased to , drain current will become
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Sign in to UnlockAn n-channel JFET, having a pinch off voltage of −5V, shows a trans-conductance of 1mA/V when the applied gate-to-source voltage is -3V. Its maximum trans-conductance (in mA/V) is
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Sign in to UnlockAn enhancement type n-channel MOSFET is represented by the symbol
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