ELEC160 Lab 4

A 4.7 zener diode is connected to the base resistor. The left side of the resistor sits at about 12V. The right side of the biasing resistor is connected to the Zener and npn transistor. The Zener bias is 5mA. The base current needed is 80uA. What is the appropriate resistor for this circuit? (In kohms) I

two applications for a Bipolar Junction Transistor and talk about one in detail

a) Figure B3 shows a cross section for a Metal Oxide Semiconductor Field Effect Transistor (MOSFET) in diagrammatic form. (i) (ii) Sketch the energy band diagram for the MOSFET along the line X-Y shown in Figure B3 when bias voltages are applied such that the silicon surface is inverted. Label all important features of your sketch and state any assumptions made. Sketch a box plot showing the charges present in the structure when the silicon surface is inverted. Indicate the source of all the charges and state whether they are positive or negative. Source n+ Metal Silicon Substrate - p X dioxide Drain n*

Design the following MOSFET circuit for it to operate in saturation mode with 0.5 mA drain current. Determine Rp and dc voltage VĎ. Assume V₁ = 2 V and K = 0.1 mA/V² for this MOSFET. 10 V RD -VD

2. We discussed in class how the channel capacitance can be modeled in different region of operations in MOSFETs. For your reference, the slide is shown below. Explain how you think the model would look like if a transistor is in velocity saturation region? Channel Capacitances Channel capacitance is a voltage dependent and non-linear capacitance S C P-sub Bulk Cutoff Region D Operation Region Cutoff Linear Saturation S P-sub Bulk C Linear Region CGBCH CoxWLeff 0 0 1 2 3 S P-sub Bulk Saturation Region CGSCH 0 сат CoxWL eff 1 2 CGDCH 0 CoxWLoft CoxWLoff eff D 0

In a properly Biased NPN transistor most of the electrons from the emitter A. recombine with holes in the base, B. recombine in the emitter its self, C. pass through the base to the collector, D. are stopped by the junction barrier. In transistor, the relation among emitter current, base current and Collector Current is: A. Ic=IB+IE, B. Ig=IB+Ic, C. IE=Ic-IB, D. I=Ig-Ic. • Transistor is known as bipolar transistor because it has: A. Electrons, В. Holes, C. Electrons and holes, D. None of the above. In NPN or PNP transistor: A. Ic> IE, B. IE >Ic, C. IE = Ic, D. None of the above. The base of an NPN transistor is: A. Heavily doped, B. Lightly doped, C. Medium Doped, D. Doped by pentavalent material. In a transistor the value of a (B) is 100, the value of (a) is: A. 0.01, В. О.1, C. 0.99, D.1.

Pls help ASAP. Pls show all work.

Draw the energy band diagram of a p-n-p* bipolar junction transistor. Show all the relevant energies - conduction and valence band edges, Fermi energies, Intrinsic Fermi energy and built-in potentials. Identify which region is heavily doped. Draw very carefully and in a very tidy manner. No free hand diagrams

05: Choose the correct answer: 1. The current in FET flows between terminals. (Drain and gate Drain and source Gate and soarce None of these) 2. The threshold voltage is in enhancement type metal oxide semiconductor field effect transistor. (Positive Negative Zero Positive) 3. The drift current density effected by (An electric filed • Concentration gradient in holes • Concentration gradient in free electrons All of these) 4. The band gap between conduction and valance band in an insulator is (Low Very low High Moderate) 5. Operating point of a transistor must be independent of (Biasing Amplification Variations in parameters Filtration) 6. When a transistor operating at the central of the load line is declining, the current gain will change the Q-point (down up nowhere of the load line) 7. A bipolar junction transistor when used as a switch, operates in (cut-off and active region active and saturation region cut-off and saturation region all of these) 8. Inversion layer in an MOS…