Questions from Electronics

Q: Using the curves of Fig. 1.48a, what level

Using the curves of Fig. 1.48a, what level of temperature coefficient would you expect for a 20-V diode? Repeat for a 5-V diode. Assume a linear scale between nominal voltage levels and a current leve...

Q: Determine the dynamic impedance for the 24-V diode at IZ

Determine the dynamic impedance for the 24-V diode at IZ = 10 mA for Fig. 1.48b. Note that it is a log scale.

Q: Compare the levels of dynamic impedance for the 24-V diode

Compare the levels of dynamic impedance for the 24-V diode of Fig. 1.48b at current levels of 0.2, 1, and 10 mA. How do the results relate to the shape of the characteristics in this region?

Q: Referring to Fig. 1.52e, what would appear to

Referring to Fig. 1.52e, what would appear to be an appropriate value of VK for this device? How does it compare to the value of VK for silicon and germanium?

Q: Consult your reference library and determine the level of Eg for GaP

Consult your reference library and determine the level of Eg for GaP, ZnS, and GaAsP, three semi- conductor materials of practical value. In addition, determine the written name for each material.

Q: Given that Eg = 0.67 eV for germanium, find

Given that Eg = 0.67 eV for germanium, find the wavelength of peak solar response for the material. Do the photons at this wavelength have a lower or higher energy level?

Q: Using the information provided in Fig. 1.52, determine

Using the information provided in Fig. 1.52, determine the forward voltage across the diode if the relative luminous intensity is l.5.

Q: a. What is the percentage increase in relative efficiency of the

a. What is the percentage increase in relative efficiency of the device of Fig. 1.52 if the peak current is increased from 5 mA to 10 mA? b. Repeat part (a) for 30 mA to 35 mA (the same increase in cu...

Q: a. If the luminous intensity at 0° angular displacement is

a. If the luminous intensity at 0° angular displacement is 3.0 mcd for the device of Fig. 1.52, at what angle will it be 0.75 mcd? b. At what angle does the loss of luminous intensity drop below the 5...

Q: Sketch the current derating curve for the average forward current of the

Sketch the current derating curve for the average forward current of the high-efficiency red LED of Fig. 1.52 as determined by temperature. (Note the absolute maximum ratings.)