The main purpose of the N-channel transistor in the MOSFET power switch circuit is to invert the control signal, to prevent loading of the control signal, to provide high current capability, and to ground the source of the P-channel power MOSFET.
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The main purpose of the N-channel transistor in the MOSFET power switch circuit is to provide high current capability. Show more…
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Consider the circuit depicted in the figure shown below. This circuit is designed using a silicon bipolar junction transistor (BJT) with a forward current gain (β) of 100, and two resistances (Rb = 1kΩ and Rc = 1kΩ). The supply voltage is Vcc = 10 volts. The currents Ib and Ic designate the base and collector currents, respectively, whereas the voltage Vce denotes the voltage between the collector and emitter. Vcc 10 volts 1kΩ Rb = 1kΩ Vce GND Throughout this question, you will use VBE = 0.7 volts and VCEsat = 0.2 volts. Recall that VBE is the threshold voltage of the base-emitter junction, while VCEsat represents the voltage that is measured between the collector and emitter when the BJT is saturated. What is the value of the base current Ib? Please enter the value expressed in milliamperes (mA) in the box below. For instance, if you think that Ib = 0.1 mA, enter 100 in the box. If you think that Ib = 10 mA, enter 10 in the box. What is the value of the collector current Ic? Please enter the value expressed in milliamperes (mA) in the box below. For instance, if you think that Ic = 0.1 mA, enter 100 in the box. If you think that Ic = 10 mA, enter 10 in the box. What is the value of the voltage Vce? Please enter the value expressed in volts (V) in the box below. For instance, if you think that Vce = 10 V, enter 10 in the box. If you think that Vce = 10 mV, enter 0.01 in the box.
Manish J.
Choose the correct option. 1. When operated in cutoff and saturation, the transistor acts like a a) linear amplifier b) switch c) variable capacitor d) variable resistor 2. A circuit contains two unequal resistances in parallel a) current is same in both b) large current flows in larger resistor c) potential difference across each is same d) smaller resistance has smaller conductance 3. Which of the following is true for a bipolar junction transistor a) IB is controlled by RB b) IB is controlled by VBB c) VCE is controlled by IB d) IC is controlled by IB e) All of the above 4. Which of the following are made of transistors a) Integrated Circuits (ICs) b) Microprocessors c) Logic Gates d) All of the above 5. Multisim is used for a) Programming b) Inserting multiple sims into a software c) Constructing real-world circuits in a software environment d) all of the above 6. In cutoff, VCE is equal to a) 0 b) Minimum c) VCC d) VBB 7. Which characteristic of a transistor is utilized in modern digital systems functionality a) Amplification b) Switching c) Rectification d) Biasing 8. In saturation, VCE is equal to a) 0 b) Minimum c) VCC d) VBB 9. When one leg of a parallel circuit is opened, the total current will a) reduce b) increase c) decrease d) become zero 10. In Uni-train based labs, how many signals can we observe as input to an oscilloscope? a) 1 b) 2 c) 3 d) 4 11. In the case of an open circuit, __________ current will flow in the circuit a) zero b) very low c) Normal d) Infinite 12. The bypass capacitor is connected with a transistor to a) Remove DC b) Bypassing AC to reduce noise c) Both of the above d) None of the above 13. The word "Bias" is used in electronics for a) the amount of current across a diode b) a DC voltage is applied to control the operation of a device c) the ratio of majority carriers to minority carriers d) None of the above 14. A Zener diode cannot operate in the forward biased region a) True b) False 15. The Beta of a transistor is its a) current gain b) voltage gain c) power gain d) internal resistance 16. In many cases, a short circuit at houses/industry is a cause of fire. Short circuits are responsible for fire because of a) high voltage b) high current c) high resistance d) All of the above 17. The resistance of a 100 W, 200 V lamp is a) 100 ohm b) 200 ohm c) 400 ohm d) 1600 ohm
Cyra Jelle C.
Consider an amplifier circuit using a BJT having IS = 10^(-15) A, a collector resistance RC = 6.8 kΩ, and a power supply of VCC = 10 V. (a) Determine the value of the bias voltage VBE required to operate the transistor at VCE = 3.2 V. What is the corresponding value of IC? (b) Find the voltage gain Av at this bias point. If an input sine-wave signal of 5-mV peak amplitude is superimposed on VBE, find the amplitude of the output sine-wave signal (assume linear operation). (c) Find the positive increment in VBE (above VBE) that drives the transistor to the edge of saturation where VCE = 0.3 V. (d) Find the negative increment in VBE that drives the transistor to within 1% of cutoff (i.e., to VCE = 0.99VCC).
Sri K.
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