20 N Vripple A V, =5 V RL 100 N Figure P9.85
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Consider the voltage-regulator circuit shown in Figure P9.85. The ac ripple voltage is 1 V peak to peak. The dc (average) load voltage is 5 V. What is the Q-point current in the Zener diode? What is the maximum dynamic resistance allowed for the Zener diode if the output ripple is to be less than 10 mV peak to peak?
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- Determine the value that the unknown emf (E) must have so that the potential V12 = 9vThe average value of the output voltage with PWM is Vo = 5 V. If the on state duration Ton is 5 µs and supply voltage Vin = 20 V, find the duty ratio d, switching period Ts and switching frequency fs of the system. Draw the waveforms for Vin and Vo voltages stating on and off durations.Table 1: Discuss in what value of the load resistor does the zener diode starts to conduct and regulates its input voltage? Explain briefly. Table 2: Discuss in what value of Vi does the zener diode starts to conduct and maintain its output voltage constant? Explain briefly.
- Consider the circuit of Figure P9.9. Determinewhether the diode is conducting or not. Assume thatthe diode is an ideal diode. Consider: VC = 10 V and VB = 15 V. (Ignore the values in the figure)The following set up the circuit with the numbers below. system By finding the required Ckomp value to operate 0.98 inductive make the compensationCalculate the average value of the output voltage for ? = 60 ° of a three-phase full-wave thyristor rectifier operating on a network with phase neutral voltage of 100V.
- Matter Energy Transformation, answer the following questions: It is very necessary Answer the following : Draw the simple circuit diagram for half controlled rectifier with R-load. (ii) Draw the output voltage of the load. () Derive an expression for the average output voltage. (iv) Derive an expression for the rms value of the output voltage.A diode whose internal resistance is 20 ohms is to supply power to a 1000-ohm load from a 110V(rms) source of supply. Calculate the peak load current, dc load current. and determine the percent regulation from no load to the given load. a.) Peak Load Current= 120.8mA; DC load current=25.5mA b.) Peak Load Current= 133.3mA; DC load current=29.4mA c.) Peak Load Current= 144.3mA; DC load current=34.7mA d.) Peak Load Current= 152.5mA; DC load current= 48.5mAExplain briefly the difference between passive and active components.
- How would you add the thermal interfaces of a heatsink using the concept of thermal resistance? Specifically the thermal resistance between ambient temperature and the case of the IC and the case of the IC and the junction of the IC. 1. RCA in series with RJC or 2. RCA in parallel with RJCConsider the circuit shown in Figure P9.69, in which the RC time constant is very long compared with the period of the input and in which the diode is ideal. Sketch vo(t) to scale versus time.Consider the circuit of Figure P9.9. Determinewhether the diode is conducting or not. Assume thatthe diode is an ideal diode. Consider: VC = 15 V (Ignore the value in the figure)