*4.134. (a) Find current I and voltage VO in Fig. P4.134(a) if W/L = 20/1 for both transistors and VDD = 10 V. (b) What is the current if W/L = 80/1? (c) Repeat for the circuit in Fig. P4.134(b). (a) (b)
Design the folded-cascode circuit presented in the figure below to provide voltage gain of 80 dB and a unity-gain frequency of 20 MHz when CL = 10 pF. Design for IB = I, and operate all devices at the same |VOV|. Utilize transistors for which |VA| is specified to be 12 V. Find the required overdrive voltages and bias currents. What slew rate is achieved? Also, for the 0.25−μm CMOS technology of Appendix K in which and kp = 93 μA/V2, specify the required W/L of each of the 11 transistors used.
Part A A particular logic inverter has VDD = 5 V, VSS = 0 V, VH = 4.8 V, VL = 0.1 V, VOH = 4.5 V, VIH = 3.5 V, VOL = 0.5 V, VIL = 1 V, and VM = 2.3 V. For simplicity, I will represent the VTC as f(x). For example, the value of the output voltage when the input voltage is 1 V is given by f(1). The following statements are true (select all that apply): f(0) = 5 V f(0.1) = 5 V f(0.1) = 4.8 V f(2.3) = 2.3 V f(2.5) = 2.5 V For any x ≠ 2.3 V, f(x) ≠ x. For any x > 3.5 V, f(x) < 0.5 V The VTC is symmetrical Part B A particular logic inverter has VDD = 5 V, VSS = 0 V, VH = 4.8 V, VL = 0.1 V, VOH = 4.5 V, VIH = 3.5 V, VOL = 0.5 V, VIL = 1 V, and VM = 2.3 V. For simplicity, I will represent the VTC as f(x). For example, the value of the output voltage when the input voltage is 1 V is given by f(1). Determine f(0.5). 0.5 1 3.5 4.5 None of the above
Question 3 (25 points) A particular logic inverter has VDD = 5 V, VSS = 0 V, VH = 4.8 V, VL = 0.1 V, VOH = 4.5 V, VIH = 3.5 V, VOL = 0.5 V, VIL = 1 V, and VM = 2.3 V. For simplicity, I will represent the VTC as f(x). For example, the value of the output voltage when the input voltage is 1 V is given by f(1). At which values of input will the slope of the VTC be -1? (Select all that apply; wrong answers are penalized.) 0.5 1 3.5 4.5 None of the above Question 4 (25 points) A particular logic inverter has VDD = 5 V, VSS = 0 V, VH = 4.8 V, VL = 0.1 V, VOH = 4.5 V, VIH = 3.5 V, VOL = 0.5 V, VIL = 1 V, and VM = 2.3 V. Determine the noise margin for the low input, NML. Enter your answer in V rounded to one decimal place. Your Answer: Answer