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Find the input resistances Rib and Rin and the overall voltage gain vo/vsig .
Grounded-base circuits of this kind are used in systems such as cable TV, in which, for highest-quality signaling, load resistances need to be matched.
The power supplies available are ±5 V. The input signal source has a resistance of 50 O , and it is required that the amplifier input resistance match .
Assuming that ß is very large, find the collector bias current IC. Replace the transistor with the small-signal equivalent-circuit model.
An amplifier with an input resistance of 100 kO, an open-circuit voltage gain of 100 V/V, and an output resistance of 100O is connected between a 20-kO .
If the load resistance changes from the nominal value of 2 kO to a low value of 1 kO, the change in output voltage is limited to 5% of nominal value.
Sketch iC -vCE characteristic curves for the BJT for iB = 10 µA, 20 µA, 30 µA, and 40 µA.
If the input signal causes a sinusoidal signal of 30-µA peak amplitude to be superimposed on IB, find the corresponding signal components of iC and vCE.
If in a particular application Vgs is 10 mV, find the minimum overdrive voltage at which the transistor should be operated so that the second-harmonic .
If a 0.02-V signal is superimposed on VGS, find the corresponding increment in collector current by evaluating the total collector current iD and subtracting.
An NMOS amplifier is to be designed to provide a 0.20-V peak output signal across a 20-k_ load that can be used as a drain resistor.
In the table below, for MOS transistors operating under a variety of conditions, complete as many entries as possible.
An NMOS technology has µnCox = 250 µA/V2 and Vt = 0.5 V. For a transistor with L = 0.5 µm, find the value of W that results in gm = 2 .
What is the voltage gain vo/vi ? What do VD and the gain become for I increased to 1 mA?
Find the small-signal model parameters (gm and ro) for both an NMOS and a PMOS transistor having W/L = 10 µm/0.5 µm and operating at ID =100 µA.
That is, assume these values, and verify that they are consistent with the values of the circuit components and the device parameters.
Calculate the collector signal current as a fraction of IC (i.e., ic/IC) for input signals vbe of +1 mV, -1 mV,+2 mV, -2 mV,+5 mV, -5 mV,+8 mV, -8 mV, +10 mV.
Three forces act on a Z-section ABCDE as shown in the figure. Point C lies in the middle of the vertical section BD. Find any equivalent force-couple system
Uniform plate ADEH with mass m is connected to the ground with a ball and socket joint at A. It is also held by three massless bars (CE, CH and BH)
An article in Microelectronics Reliability ["Advanced Electronic Prognostics through System Telemetry and Pattern Recognition Methods"]
Introduction about cloud computing (mainly what is it? /explain it in a clear way)
A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 16.5 m long.
A boat moves relative to water with a velocity which is n = 2.0 times less than the river flow velocity.
A car is behind a truck going 25 m/s on the highway. The car's driver looks for an opportunity to pass, guessing that his car can accelerate at 1.0m/s2.
A car moving at 95 km/h passes a 1.00-km long train travelling in the same direction on a track that is parallel to the road