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Two p+-n abrupt junction diodes are made from silicon and are identical except that the donor levels in the 2 diodes are ND_1=10^15 and ND_2 = 1x10^17 cm-3. Sketch on one set of axes the I-V characteristics of the diodes for operation at room temperature. Label each curve. Also sketch on the same (or similar) axes the I-V curves for the diodes at - 100 C. Repeat for 100 C. As the temperature is lowered much further below - 100C, what phenomena would limit the operation of the diodes?
Don't I need to know the saturation current for each of the two diodes? How do I find this based on the donor levels? Do I need to find the built-in voltage as well? I had intended to utilize the diode equation:I = I_0(exp(eV/kT)-1), but I am not sure how to find the saturation current (I_0) with the dopant concentrations. If you can guide me in the right direction on finding I_0 I can do the rest on my own.
What is the main operation when a comparator cascade with an active third order low pass filter, with a feedback of output to input.
An analog-to-digital converter (ADC) samples an analog voltageand computes a digital value representing that voltage. Assume anADC accepts voltages between -1.0 V and +1.0 V and hte digitalvalues are 16-bit, two's complement fractions.
A Si pn junction diode is described by its I-V equation, I?= Is exp (V?/V?) ,where V?=25mV, Is=10-14A . It is desired to derive constant drop and PWL models for the diode assuming an operating current between 1mA and 3mA.
a single parity check code used in computer listings of registatration numbers found by doubling alternate digits, beginning from the right, and adding the digits modulo-10. the parity check digit is found by taking the tens complement of this sum..
Important information about Frequency Divider, Design a frequency divider circuit that will output three pulse frequencies: 25 kHz, 10kHz, and 2.5kHz. Assume that only a 150 kHz CMOS compatible signal is available for the divider input
If an electromagnetic wave described by the TE20 mode is excited and is propagating down the waveguide, what happens to the electromagnetic wave described by the TE10 mode?
When the required bandwidth is a large portion of the center frequency, another approach is commonly used for bandpass filter design. An example might be a filter that's required to pass frequencies from 150 Hz all the way to 5 KHz.
Compare the readings of two ammeters of unequal resistance when placed in parallel with each other and the combination inserted in series in a circuit.
our boss asks you to contruct a temperature sensorfor measuring the ambient temp outside (-30degreee celcius
Use a capacitor, a resistor and an operational amplifier circuit to design an active first order low pass filter which passes frequencies that human can hear (below 15kHz). Show all the calculations required to find the values of all the passive comp..
Design an assembly code to open a vault (after entering the correct 4-number sequence "1234"), it displays it in the 7 segment display, than it displays the word OPEN when the correct sequence is entered.
A wafer 100mm in diameter is mounted in an electron-beam evaporation system in which spherical radius is 40cm. Estimate the worst case variation in film thickness between the center and edges of the wafer for an evaporated aluminium 1micro meter t..
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