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Write the equation for the voltage across the capacitor for all time t > 0 (that is, after the switch opens at t = 0). Assume that the switch has been closed a long time before t = 0 to determine
In an audio system, the microphone produces a voltage of 10mV which is connected by a cable to an amplifier with a voltage gain of 30dB. The cable introduces a loss of 5dB. Find the gain of the syst
A silicon step junction diode with NA acceptor atoms on the p side and ND donor atoms on the n side is fabricated. The diode is not ideal. What is the dominant current mechanism for forward applied
An ideal non-degenerate silicon step junction diode with an intrinsic level Ei exactly at mid band-gap is fabricated. Answer all questions related to this diode. a) If Vbi = 0.65V and NA=4ND, what i
An ideal n+/p diode has only the quasi neutral p region of length L illuminated with light such that GL electrons/cm3-s are generated uniformly throughout the region. There is no photo-generation oc
A silicon diode has a doping profile such that ND = ax3. What is the depth of the junction assuming the p side is uniformly doped with NA per cubic cm. Assume the x origin is at an ideal ohmic conta
an electric motor operates at 220V rms ,60 Hz, draws 20A rms, and has a power factor of 0.75 lagging. a) what is average power absorbed by the motor b) what value capacitor should be connected in para
A parallel-plate capacitor has capacitance 9.00 µF. (a) How much energy is stored in the capacitor if it is connected to a 9.00 V battery (b) If the battery is disconnected and the distance betw
Derive a state diagram for a Finite State Machine(FSM) that has an input w and an output z. The machine has to generate z = 1 when the privious four values of w were 1001 or 1111; otherwise, z = 0.
Each of these bands is split into two, allowing two operators. An operator is allocated 12.5 MHz in each direction. Each channel is allocated 30 kHz. If 21 channels are allocated for control, what i
A common source amplifier utilizes a mosfet for which Va= 12.5 V and is operated at Vov= .25V. What is the value of (gmro) The amplifier feed a load resistance RL= 15Kohms. The designer selects RD=2
Using data from the data sheets of the MAX505 DAC, and the various temperature coefficient of DAC errors specified at 25 degrees Centigrade, calculate the total Worst Case Error for a temperature d
Determine the total charge flowing into a element for 0< t< 2s when the current entering its positive terminal is i(t) = exp (-2t) mA. Given v1= 20sin(wt+60) and v2= 60 cos(wt-10), determine th
An amplitude modulated amplifier has a radio frequency output of 50w at 100% modulation. The internal loss in the modulator is low. What output power is required from the modulator.
Assume that the channels between the transmit antenna and the receive antennas are statistically independent Rayleigh fading channels and the MRC combination is used at the receiver. Given that the
5eV for metal work function, 4.05eV for semiconductor electroaffinity, effective density of states for conduction band is 1019cm3, n-type doping density is 1015cm3, semiconductor dielectric constant
Consider a PNP BJT optimum designed for low voltage high current gain. (a) Draw energy band diagram with proper labeling with VCB= -0.7V, VEB= 0.7V. Which mode is the BJT operated in (b)
If non-ideal interface trap density of Dit = 5x1010/cm2/eV is to be considered, what is the shift in the flat band voltage. Assuming all interface traps are acceptor-like (negatively charged if fill
Consider the voltage Consider the voltage reference circuit in Figure P9.86. Using a Zener diode with a breakdown voltage of 5.6V, design the circuit to produce an output voltage of 12V. Assume the
Design a op-amp summer to produce the output voltage Vo=2v11-10v12+3v13-v14. Assume the largest resistor value is 500k ohms, and the input impedance seen by each source is the largest value possibl
The discrete-time signal x[n] is actually the result of sampling a periodic continuous signal x(t). The signal x[n] is 1 from -12 to +12, zero from n = 13 to 87 and then it repeats. What is the posi
If the SNR must be greater than 40 dBm, how far backed-off must the amplifier operate. Assume noise comes from a third-order intermodulation between two interferers with the same power level as the
In terms of good desgn practice , what is the number of receptacles allowed on a general purpose 15 A 120V circuit. A 20A and 120V circuit. What are the requirements for the circuit supplying bathro