The MOSFET in the circuit of Fig. below has Vt = 1 V and kn = 2 mA/V2, and the Early effect can be neglected. a) Find the values of Rs and RD that result in the MOSFET operating with an overdrive voltage of 0.5 V and a drain voltage of 1.5 V. What is the resulting ID value? b) If RL is reduced from 15 kohm, to 10 kohm, what does VD become? c) If RL is disconnected, what does VD become? d) With RL disconnected, what is the largest RD that can be used while the MOSFET is remaining in saturation?
All the capacitors in the circuit shown below have large values, i.e. can be considered short circuits at low frequencies. The threshold voltage of the NMOS transistor in the common source amplifier circuit is 1 V and the kn' (W/L) = 1 mA/V2.a) Find the required DC value of the Vas that would establish a dc bias current of 1) = 2 mA; b) Find the required values for the resistances RG1 and Rg2 so both the value of VGS from part (a) can be assured and the value of the input resistance (Rin) of this amplifier to be equal or higher than 3 M22; c) Determine a value for R, so the open circuit voltage gain of this amplifier A, to be -10. NOTE: Use the small signal model discussed in lecture notes.
1) What's the name and function of this circuit? 2) What type of transistor is represented on top and bottom (respectively)? 3) Write equations relating to NMOS and PMOS drain currents. 4) Write an equation relating vDS and VS'D'. 5) Write equations relating NMOS gate to source voltage and PMOS source to gate voltage in terms of VIN and VDD. 6) What is the condition for VIN so that the NMOS would not be in Cutoff (Write appropriate equation or inequality)? 7) True or False? If drain current in MOS is zero, then it can only be in Cutoff region. 8) Yes, or no? Can a MOS be in saturation region if its drain current is zero? 9) Yes, or no? Can a MOS be in triode region if its drain current is zero? 10) True or False? If a MOS is in Cutoff, then its source to drain voltage is always zero. 11) True or False? If the gate to source voltage of a MOS is greater than the threshold voltage and the drain current is zero, then the drain to source voltage must be zero. Suppose VDD = 6V, Kn = 1.0 mA/V2, Vtn = 2 V, lambda_n = 0.0, Kp = 1.75 mA/V2, |Vtp| = 1 V, and |lambda_p| = 0.0 12) Let vIN = 2 V. Determine the value of iD and vout. 13) Let vIN = 4 V. Determine the value of iD and vout.