7.23 This problem investigates the nonlinear distortion introduced by a MOSFET amplifier. Let the signal vgs be a sine wave with amplitude Vgs, and substitute vgs = V gs sin ωt in Eq. (7.28). Using the trigonometric identity sin2θ = 1 2 − 1 2 cos2θ, show that the ratio of the signal at frequency 2ω to that at frequency ω, expressed as a percentage (known as the second-harmonic distortion) is Second-harmonic distortion = 1 4 V gs V OV ×100 If in a particular application Vgs is 10 mV, find the minimum overdrive voltage at which the transistor should be operated so that the second-harmonic distortion is kept to less than 1%

23 14 - 7.23 This problem investigates the nonlinear distortion introduced by a MOSFET amplifier. Let the signal vgs be a sine wave with amplitude Vgs, and substitute vgs = V gs sin ωt in Eq. (7.28). Using the trigonometric identity sin2θ = 1 2 − 1 2 cos2θ, show that the ratio of the signal at frequency 2ω to that at frequency ω, expressed as a percentage (known as the second-harmonic distortion) is Second-harmonic distortion = 1 4 V gs V OV ×100 If in a particular application Vgs is 10 mV, find the minimum overdrive voltage at which the transistor should be operated so that the second-harmonic distortion is kept to less than 1%

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images - 7.23 This problem investigates the nonlinear distortion introduced by a MOSFET amplifier. Let the signal vgs be a sine wave with amplitude Vgs, and substitute vgs = V gs sin ωt in Eq. (7.28). Using the trigonometric identity sin2θ = 1 2 − 1 2 cos2θ, show that the ratio of the signal at frequency 2ω to that at frequency ω, expressed as a percentage (known as the second-harmonic distortion) is Second-harmonic distortion = 1 4 V gs V OV ×100 If in a particular application Vgs is 10 mV, find the minimum overdrive voltage at which the transistor should be operated so that the second-harmonic distortion is kept to less than 1%

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