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(a) What is the forward transit time τF for an npn transistor with a base width WB = 0.5 m and a base doping of 1018/cm3?
(b) Repeat the calculation for a pnp transistor. A transistor has a dc current gain of 200 and a current gain of 10 at 75 MHz. What are the unity-gain and beta-cutoff frequencies of the transistor?
Starting with a tone having a frequency of 5440 cycles per second, find the frequencies of the tones that are one, two, three, and four octaves lower.
A Building produce 400 V at 200 A. using individual photovoltaic cells that each produce 0.5 V at 1 A . Include a schematic diagram of your design idea. How many photovoltaic cells are needed for your design.
To what extent should end users be involved in the selection of a database management system and database design?
Does a Hollywood camera make on-screen characters appear more alluring and lovely than they actually look? I was viewing a motion picture the on-screen character was beautiful in the film then when i saw her genuine picture she didn't calm look what ..
If I have an AC series circuit with a voltage source of 3 Vrms, a frequency of 5 kHz, a 100 mH coil, and a 1 kohm resistor, how do I determine what the back emf is
The power crossing the air gap of a 60 Hz, four-pole induction motor is 25 kW, and the power converted from electrical to mechanical form in the motor is 23.2 kW.
A first order highpass filter is required to satisfy the following specifaction fs=10000Hz fc=4000Hz Find the transfer function and difference equation by the pole-zero placement method.
Consult a semiconductor electronics text and note the extensive use of germanium and silicon semiconductor materials. - Review the characteristics of each material.
A wafer 100mm in diameter is mounted in an electron-beam evaporation system in which the spherical radius is 40cm. Use Eq. 6.7 to estimate the worst-case varation in film thickness between the center and edges
Consider a thin ring of radius a with uniform charge density and total charge Q. The ring is cut in half across the diameter and the two halves superimposed to double the effective charge density.
Reactors for naval vessels are designed to have very long lifetimes without the need to refuel. Discuss possible techniques that can be used to maintain criticality over the core lifetime as 235U is consumed.
a circuit consists of three elements in series. a source delivers 90 watts and one of the passive elements absorbs 20 watts. how much power does the third element absorb.
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