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two identical CE amplifiers are connected in cascade. The first stage is fed with a source eVsig having a resistance Rsig= 10k ohms. A load resistance Rl=10K ohms and is connected to the collector of the 2nd stage. Each BJT is biased at Ic= .25mA and has beta =100 and a very large Va. Each stage utilizes a collector resistance Rc=10K ohms. (a) Sketch the equivalent circuit of the two stage amplifier. (b) Calculate the voltage transmission from the signal source to the input of the first stage. (c) Calculate the voltage gain of thefirst stage, Av1. (d) Calculate the voltage gain of the second stage, Av2. (e) Find the overall voltage gain, Vo2/Vsig.
A separately excited dc motor turns at 1200rpm when the armature is connected to a 115V source. Calculate the armature voltage required so that the motor runs at 1500rpm.
An infinite sheet of uniform (constant) charge density (rho)s0 [C/m^2] is situated coincident with the x-y plane at z = 0. The sheet has a hole of radius a centered at the origin. Find the electric field vector at points along the z-axis.
1) During a transient fault and a permanent fault on the transmission line of a power network, mention the sequence of a line circuit breaker's operation. 2) During a network fault, the voltage and active power of a synchronous generator drops
t uses four diodes, each of which can be modeled to have a 0.7-V drop for any current. What is the peak value of the rectified voltage across the load. For what fraction of a cycle does each diode conduct.
A potentiometer with a total range of 350° is supplied with a voltage of 12 Vdc. Find the output voltage for an angle of 135°. An absolute optical rotary encoder has five tracks. How many bits is the output
A successive approximation A/D converter with range of 0 to 5 volts and a resolution of 0.05 volts is specified. It will be clocked at 500 KHz. a. Determine the number of bits that must be specified for this converter. b. Determine the t..
A battery has an internal resistance of 0.029-ohm and an emf of 9.00 V. What is the maximum current that can be drawn from the battery without the terminal voltage dropping below 8.60 V
If one page of memory can store 25 lines of characters with each line con- taining 80 characters, how many pages of information are there in 3 GBs of memory
If we want to correct the power factor to 0.9 lagging, what is the value of Q we need to inject.
An infinite sheet of surface current density given by (equation 1) A/m exists on a plane defined by x=1. A second infinite sheet of surface current density given by (equation 2) is on the plane defined by x = -2. What is the magnetic field intensi..
If an object is located at 0.5 times the focal length of a thin lens, calculate the location and lateral magnification of the image. Assume that both sides of the lens are filled with air, that the index of refraction of the lens is n=1.5
(a) Determine free electron and hole concentration.(b) Calculate the effective density of states at valence band, Nv. Given that ni = 1x1010 cm3 and kT = 0.026.
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