For the differential amplifier shown here, VDD = VSS = 5 V, the load resistance R = 80 kΩ. The biasing current is provided by a MOSFET current mirror, IREF = 250 μA. For MOSFETs, Kn1,2,8,9 = 0.25 mA/V2, Kp3,4 = 0.20 mA/V2, VTN = VTP = 1.0 V, λ1−4 = 0.01 V−1. Channel length modulation is neglected for M8,9, i.e. λ8,9 = 0. Here VDS is neglected in the calculation of ro. (a) Find the Q points of M1, M3, M8 and M9. (24 pts) (b) Find the differential mode voltage gain and the output resistance. (12 pts) (c) Find the input resistances for the differential mode and common mode. (12 pts)

For the differential amplifier shown here, VDD = VSS = 5 V, the load resistance R = 80 kΩ. The biasing current is provided by a MOSFET current mirror, IREF = 250 μA. For MOSFETs, Kn1,2,8,9 = 0.25 mA/V2, Kp3,4 = 0.20 mA/V2, VTN = VTP = 1.0 V, λ1−4 = 0.01 V−1. Channel length modulation is neglected for M8,9, i.e. λ8,9 = 0. Here VDS is neglected in the calculation of ro. (a) Find the Q points of M1, M3, M8 and M9. (24 pts) (b) Find the differential mode voltage gain and the output resistance. (12 pts) (c) Find the input resistances for the differential mode and common mode. (12 pts)

Image text
For the differential amplifier shown here, VDD = VSS = 5 V, the load resistance R = 80 kΩ. The biasing current is provided by a MOSFET current mirror, IREF = 250 μA. For MOSFETs, Kn1,2,8,9 = 0.25 mA/V2, Kp3,4 = 0.20 mA/V2, VTN = VTP = 1.0 V, λ1−4 = 0.01 V−1. Channel length modulation is neglected for M8,9, i.e. λ8,9 = 0. Here VDS is neglected in the calculation of ro. (a) Find the Q points of M1, M3, M8 and M9. (24 pts) (b) Find the differential mode voltage gain and the output resistance. (12 pts) (c) Find the input resistances for the differential mode and common mode. (12 pts)

Detailed Answer

Answer
  • Student Reviews:
  • (1)
  • Correct answers (1)
  • Complete solution (1)
  • Step-by-step solution (1)
  • Fully explained (1)