Using Eq. (15.10), calculate the parasitic capacitance of an 11.5-in.-long, 15-mil-wide stripline trace with a spacing of 12 mils to the ground plane, fabricated on an FR4 PCB. This trace feeds a 300-kHz, 1-V RMS sinusoidal signal from a DUT output having a 75-kΩ output resistance to an unterminated coaxial cable (tester instrument input) having a distributed capacitance of 35 pF. How much will the distributed capacitance of the trace and coaxial cable capacitance attenuate the DUT signal? (Express your answer as a voltage gain in decibels.) Would a DIB buffer amplifier be required for this output? Compare your answer with that obtained using the refined capacitance estimate of Figure 15.16.
