electronics circuits ii course-part 6-nmos dc circuits
TRANSCRIPT
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Electronic Circuits II Course:
NMOS DC Circuits
Dr. Yehya H. Ghallab
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Outline
• MOSFET Formulas
• MOSFET Circuits at DC
• NMOS Inverter with Resister Load
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Outline
• MOSFET Formulas
• MOSFET Circuits at DC
• NMOS Inverter with Resister Load
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MOSFET Formulas
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Outline
• Introduction
• MOSFET Formulas
• MOSFET Circuits at DC
• NMOS Inverter with Resister Load
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Example
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Solution
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Example
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Solution
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Outline
• Introduction
• MOSFET Formulas
• MOSFET Circuits at DC
• NMOS Inverter with Resister Load
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NMOS Inverter with Resistor Load
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• As the input voltage increases (VGS
), the drain to source
voltage (VDS
) decreases and the transistor inter into the
nonsaturation (linear) region.
• If VI <VTN , the transistor is in cutoff and iD = 0, there is no voltage drop across RD, and the output voltage is Vo=VDD=VDS
• If VI >VTN , the transistor is onand initially is biased insaturation region, sinceVDS > VGS -VTN .
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NMOS Inverter with Resistor Load
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If VGS <VTN , the transistor is in cutoff and iD = 0, there is
no voltage drop across RD, and the output voltage is
Vo=VDD=VDS
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NMOS Inverter with Resistor Load
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NMOS Inverter with Resistor Load
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NMOS Inverter with Resistor Load
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NMOS Inverter with Resistor Load
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Summary of NMOS inverter with
Resistor Load
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Example
For the NMOS inverter shown inFig. V
DD= 3V. Assume transistor
parameters of K’n = 60 μA/v2,W/L = 5, and V
TN= 0.5 V.
(a) Find the value of RD
such thatvo
= 0.1 V when vI= 3 V.
(b) Using the results of part (a)determine the transition pointfor the driver transistor
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Solution
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