The carrier effective masses in a semiconductor are mn*= 1.21 mo and mp*= 0.70 mo. Determine the position of the intrinsic Fermi level with respect to the center of the .bandgap at T= 300 K 10.63 meV O -10.63 meV O -1.063 meV O 1.063 meV O
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- Assume that the Fermi level is near the valence band. Which of the following is true? Select one: O a. Non of the answers. O b. n+p=ni. O C. p>n. d. n=p=ni. O e. n>p.The forward biased diode has an admittanice (inverse of impedance) shown below. At what freguency in MHz will the admittance of the resistor (G) be 6.1 times the magnitude of the capacitor's admittance? You can assume the ideal diode has a forward bias of 0.65 V, a characteristic current of 6.2 fA (fempto = 1015), and a minority carrier lifetime of 2.9 microseconds. You can assume that you can use equation 7.29 of the text, Under what conditions would the magnitude of the capacitor's admitance be 5.1 times the admittance óf the resistor (G? Three significant digits and fixed notation. Diode admittance Rs G3. Find no and Po, and locate the Fermi level. Draw the energy band diagram. a. b. Silicon is doped with ND = 2 × 1016 cm³. A new batch of silicon is doped with boron to NA = 8 × 1014 cm³.
- Determine the capacitance of diffused junction varactor at a reverse potential of 4.5 V. if C(0) = 85 pF and V₁ = 0.7 V. Also determine the value of K.IMG 2839.HEIC Find Potential charge on each Capacitor: 1ME C2 10MF. 10MF 1.5VQuestion 1: In the circuit shown below, the output (Vo = 10V Max.) Unipolar. The frequency of Primary is 60 Hz. The diodes are Silicon with VD = 0.7V. a. Sketch the output without a Capacitor. b. Determine Voc without a Capacitor. c. Sketch Vs (at the Secondary). d. Determine Voc with a Capacitor of 10 uF across RL. e. Determine the RMS Value of Vp (at the Primary). f. PIV (Peak Inverse Voltage). 10:1 Output C. 22 k1 All diodes are IN4001. | 00000
- Problem 3 For the circuit shown below, assume that: R=20kQ, D1, D2, D3 and D4 are modeled by a battery of 0.8 V and rB = 30Q, the Zener diode has 5 V breakdown voltage and rz= 502. 'Vin' is a sinusoidal signal with 1 kHz frequency and amplitude voltage of 15 V: • Sketch 'Vout' and Iz' for -15V< Vin <15V. • Plot 'Vout' and Iz’ versus time • What is the function of this circuit? Vout w- + + D4 D, Vin Dmodels Diodes-Piece-wise Problem #1 In the circuit shown below, the voltage source Vin is given by the sketch. Assuming an ideal diode, sketch the waveform resulting at Vout. Use the axis at the bottom to help you sketch the voltage output. 10Ω Vin +7V -7V + Vin Vin AA 1 3 4 5 1 2 D 3 5 V 4 + Vout 5 6 ➡t (ms) +++t (ms) 6For the given circuit for a 4O V (p-p) sinusoidal input vi, what is the value of vi at which the clipping begins? V=5V. NOTE: use ideal diode
- At 315 °K temperature, the voltage equivalent of temperature of diode is V. Assume the Boltzmann's constant is 8.62*10-5 ev / °KWhat voltage is boosted at the output of a multiplier.Choices: average, rms, peak, or instantaneous Which assumption is not used in the analysis of multipliers?Choices: a capacitor will not discharge, start with the cycle of the source that will forward bias the nearest diode, the output will always be multiplied, or a single diode is forward biased at a time A voltage multiplierChoices: multiplies the output voltage, has very high voltage and low current ,can employ inductors, or may not have equal numbers of diodes and capacitors A voltage regulator maintains constant voltage at the load regardless of variations atChoices: the input and output, the load, source, or in the environment Between a lower percent regulation and a higher one, which is better?Choices: lower or higherDetermine the noise current for a diode with a forward bias of 1mA over a 100 kHz bandwidth. If the diode is in a circuit with 5002 series resistance, calculate the total output noise voltage at 27°c. (from miller: In = 0.00566µA, total noise voltage = 0.154 µVrms) %3D