9.26 For the differential amplifier of Fig. 9.15(a) let I = 0.2 mA, VCC = VEE = 1.5 V, VCM = −0.5 V, RC = 5 kΩ, and β = 100. Assume that the BJTs have vBE = 0.7 V at iC = 1 mA. Find the voltage at the emitters and at the outputs. Hide Answer −1.14 V;+1 V;+1 V (a)
A diode taken from the following circuit was previously tested by applying 0.75 V from anode to cathode. It was found that the current flowing through it was 39.22 mA during the test. The same diode was used in the following circuit. Find the current from the source, the voltage across the diodes, and the voltage V2 using the exponential model. Assume VS = 5 V, R1 = 3 kΩ, R2 = 5 kΩ, and VT = 25 mV. Hints: Notice that the current on one diode must be equal the current on the other. Use the exponential model for the diode. Type your answer using 3 significant digits. Examples: 3450, 345, 34.5, 3.45, 0.345, etc. IS = mA VD = V V2 = V
18.6 An NMOS pass-transistor switch with W/L = 130 nm/65 nm, used in a 1-V system for which Vto = 0.35 V, γ = 0.25 V1/2, 2ϕf = 1.0 V, μnCox = 3μpCox = 450 μA/V2, drives a 10-fF load capacitance at the input of a matched standard CMOS inverter using (W/L)n = 130 nm/65 nm. For the switch gate terminal at VDD, evaluate the switch VOH and VOL for inputs at VDD and o V, respectively. For this value of VOH, what inverter static current results? Estimate tPLH and tPHL for this arrangement as measured from the input to the output of the switch itself. Hide Answer VOH = 0.59 V; VOL = 0 V; iDP(VOH) = 1.08 A; tPLH = 51.6 ps; tPHL = 27.0 ps