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- Give a conclusion about BIPOLAR JUNCTION TRANSISTOR: OPERATION AND ITS CHARACTERISTIC CURVEA 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) IAll field-effect transistors are unipolar rather than bipolar devices. That is, the main current through them is comprised either of through an N-type semiconductor * ..... .....
- two applications for a Bipolar Junction Transistor and talk about one in detailThis is about Bipolar Junction Transistors: Discuss collector characteristic curves and identify and explain the different regions.1. The collector-base voltage of a Si transistor is a. None of these b. zero c. 0.7 volts d. 0.3 volts 2. The current gain of a common-emitter transistor is the ratio of the a. base current to collector current b. collector current to emitter current c. collector current to base current d. Emitter current to collector current 3. A zener diode shunt regulator uses the zener connected a. in series with the load b. in series with RS c. across RS d. across the load 4. If the transistor is to operate in the saturation region, the base-emitter and the base-collector terminal has to bea. both forward-biased b. both reversed-biased c. reversed-biased and forward-biased respectively d. forward-biased and reversed-biased respectively 5. The base-emitter of the transistor operating in the active region is usually a. operating in the breakdown region b. reverse-biased c. forward-biased d. non-conducting
- (a) What are Transistor limits of operation? Explain the phenomenon of Break Down in Transistors with the help of sketches? How does this compare with Diodes?The term cut-off for a transistor refers to a. the transistor is at its operating point b. no current flow from emitter to collector c. maximum current flow from emitter to collector d. there is no base currentExplain the two types of MOSFETs (draw the physical structure as well). Also explain themajor difference between them regarding mode of operation?
- Describe the basic principle of operation of a bipolar junction transistor. Include explanation for the following : When minority carriers flow across the transistor Why the collector current is almost unaffected by the collector potentialIntroduction: For ohmmeter testing purpose, an NPN transistor is similar to two diodes back to back, as shown in figure 12b. there exists two PN junctions, base-emitter and base collector. When each of these junctions is forward biased, the positive lead of the ohmmeter must be connected to P material, and the negative lead to the negative N material (Figure 12c). there should be low resistance reading when these junctions are reverse biased, positive lead to N material and negative lead to P material (figure 12d). The PNP transistor can be tested with a similar method, except that the diodes are face to face as shown in figure 12e. this simple test determines if the transistor is shorted or open on a go (no problems)/no go (it has problems) basis.A two-junction semiconductor transistor with a positive type collector and emitter, and negative type base is known as?