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Question-3: Sketch the voltage transfer characteristic of the NMOS inverter circuit given in Figure 3 by calculating the output voltage Vout for Vin = 0, 2, 4, and 5 V. Find also noise margins. (K = 1 mA/V2, Vt = 1 V for the NMOS transistor. ) Figure 3: NMOS inverter

Question-3: Sketch the voltage transfer characteristic of the NMOS inverter circuit given in Figure 3 by calculating the output voltage Vout for Vin = 0, 2, 4, and 5 V. Find also noise margins. (K = 1 mA/V2, Vt = 1 V for the NMOS transistor. ) Figure 3: NMOS inverter

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Question-3: Sketch the voltage transfer characteristic of the NMOS inverter circuit given in Figure 3 by calculating the output voltage V out for V in = 0 , 2 , 4 , and 5 V . Find also noise margins. ( K = 1 m A / V 2 , V t = 1 V for the NMOS transistor.) Figure 3: NMOS inverter

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Consider the basic TTL inverter given in Figure 2. Assume that VBE = 0.7 V, VBE(SAT) = 0.8 V, VCE(SAT) = 0.2 V, VBC = 0.7 V, βf = 50, βR = 0.1. Use σ0 = 0.8 (saturation parameter of Q0) for the output low state. i) Find the operation mode of each BJT and IIN, IRB, IRC, IB2 when Vin = 0 V and Vin = 5 V. ii) Sketch the voltage transfer characteristics by finding VOL, VOH, VIL, VIH. iii) Find the noise margins. iv) Find the maximum fanout. What is the limiting case for determining the fan-out limit of this circuit?

Consider the basic TTL inverter given in Figure 2. Assume that VBE = 0.7 V, VBE(SAT) = 0.8 V, VCE(SAT) = 0.2 V, VBC = 0.7 V, βf = 50, βR = 0.1. Use σ0 = 0.8 (saturation parameter of Q0) for the output low state. i) Find the operation mode of each BJT and IIN, IRB, IRC, IB2 when Vin = 0 V and Vin = 5 V. ii) Sketch the voltage transfer characteristics by finding VOL, VOH, VIL, VIH. iii) Find the noise margins. iv) Find the maximum fanout. What is the limiting case for determining the fan-out limit of this circuit?
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Consider the shown circuit Part 1: Hand Calculation Assume that VBE(on) = 0.7 V, VBE( sat ) = 0.8 V, VCE( sat ) = 0.1 V, forward βF = 25, reveres βR = 0.1, a) Fill in the table below, what is the logic gate? Vx Vx Qx Qx Q1 Q2 Q Vout 0.1 V 0.1 V 0.1 V 5 V 5 V 0.1 V 5 V 5 V b) Assume a 10k load resistor is connected calculate Vout and the output current if: Vx = Vx = 0.1 V Vx = Vy = 5 V c) Calculate the power drawn from the supply volt-age VCC if: Vx = Vx = 0.1 V Vx = Vx = 5 V Part 2: Simulation Draw the circuit on LTSpice a) Verify the results obtained in part (a) of the hand calculation using DC operating point analysis b) Set Vx = 0 V and use DC sweep analysis varying Vy from 0 to 5 V. Draw the voltage transfer characteristics (VTC) c) Set Vx=0V, and set Vy to be a pulse with the parameters: Vinitial = 0, Von=5, Tdelay = 2 ns, Trise = 1 ns, Tfall = 1 ns, Ton=5ns, and perform transient analysis for 10ns, plot Vy and Vout and measure the delays tpHL and tpLH (measure the delays from the start of the input pulse to the point when Vout reaches VOH or VOL) Notes: Homework submission is through the Moodle platform Submit a single compressed file containing: The hand calculations Screenshot showing the circuit and the simulation results The schematic file (.asc) The netlist file (.net)
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