2. Since the input impedance of each subsequent stage of a cascaded amplifier forms the load of the previous stage, the design should start with the last stage and proceed backwards to the input. Therefore, begin your design with the CC output stage. The first design step is to select an appropriate bias current based on the stated swing requirement. This enables you to find the numerical values for the input and output resistance, respectively and thus the voltage gain under the given operating conditions. To find values for the biasing circuitry, derive symbolic expressions for input resistance, output resistance and voltage gain and then compute the resulting numerical values.

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?