4.68 A half-wave rectifier circuit with a 1-k2 load oper- ates from a 120-V (rms) 60-Hz household supply through a 10-to-1 step-down transformer. It uses a silicon diode that can be modeled to have a 0.7-V drop for any current. What is the peak voltage of the rectified output? For what fraction of the cycle does the diode conduct? What is the average output voltage? What is the average current in the load?
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- A half wave rectifier circuit with a 1K ohm load operates from a 120V rms 60-Hz household supply through a 10-to-1 step down transformer. It uses a silicon diode that can be modeled to have a 0.7V drop for any current. What is the peak voltage of the rectified output? For what fraction of a cycle does the diode conduct? What is the average output voltage? What is the average current in the load? Thanks for any help.a) Use the diode’s characteristic equation,ID=Is exp(VD/VT), to determine the currentsourceIso that the output voltage is 1.5 V. b) If a load is attached to the output that draws 1 mA, what is the output voltage? c) If the circuit heats up to 40◦C, what is the output voltage without a load?Can the regulator given in Figure Q4.b be used to regulate the output of a full-waverectifier, given the specifications for Io and Vpk in the Table 4 above? The rectifier voltage varies between 0.7Vpk and Vpk (that is, the ripple voltage is 30%of Vpk). The value of the Zener voltage Vz is 5.6 V, and the Zener diode power ratingis 2W. The regulator must supply to the load the current of at least Io mA. mA = 160 V = 22v To answer this question, you need to determine the value of the resistor R for theoutput requirements specification for Io and Vpk given in Table 4.
- Draw the circuit diagram of a single phase full-wave uncontrolledrectifier with R-load. Describe its principle of operation. Draw thewaveforms of: input voltage, voltage across the load, current throughthe diodes and their voltage. Write the expressions for: the averageoutput voltage Vd, the maximum reverse voltage across the diode and thestandard transformer power. Describe what the difference will be if acapacitor is added in parallel with the load at the output.Figure Q4.c shows an alternative regulator circuit that could be used in a DC powersupply design to regulate the output of a rectifier. Determine the suitability of the regulator for a rectifier with the output specifications asgiven in Table 4. The ripple voltage of the rectifier is 30% of Vpk, and the regulatorneeds to deliver to the load the current of Io mA.The Zener diode power rating is 2W. The required output voltage is 7.4V. For the circuit in Figure Q4.c: determine the required Zener diode voltage Vz; find a suitable value of the resistor R; determine the minimum requirement for the transistor power rating PTR. 2) What is the role of the resistor R in this circuit? Show your working throughout and state any assumptions you may make.Provide commentary to your design process, and evaluate your design.A full-wave bridge rectifier with a 236.86V p-p sinusoidal input has a load resister of 2KΩi. Draw the wave form that the load resistor R would see. ii. Assuming diodes are ideal, what is the dc voltage available at the load resistor? iii. What is the dc voltage available at the load if silicon diodes are employed? iv. Calculate the maximum current flow through the Diode D4 during conduction.
- A half-wave rectifier is needed to supply 15-V dc to a load that draws an average current of 250 mA. The peak-to-peak ripple is required to be 0.2 V or less. What is the minimum value allowed for the smoothing capacitance? If a full-wave rectifier is needed?Describe the operating principle and characteristics of a typical Zener diode found in the market place, including examples of their common applications. The circuit shown below is to be used to provide a stabilised output to the load. The Zener diode characteristic is also shown on the next page. Find the load voltage (VL) and source current (IS) if the battery voltage is 18 V, series resistance is 1.4 KΩ and load resistance is 11 KΩ. Additionally, determine the value of the source resistance (R) if the Zener diode is at the threshold of activating in its reverse bias. Comment on the purpose of having this value of R in the circuit.Power Electronics Draws a current of 12 V and 0 - 25 mA from a DC voltage source that fluctuates between 15 - 18 V.A constant DC voltage source is obtained with a 12 V and 5 Ω zener diode to feed a DC receiver.is wanted to be. Since IZmin=5 mA for this zener diode, a) How many ohms can the current limiting resistor be?b) Find the min and max values of the full voltage at the load ends for the same resistance?
- What is the resistance in the forward-conduction region of the shockley diode based from the problem. No need to compute for the current.Some electronic devices operate on a DC voltage of 7.5 V. To obtain 7.5 V DC from a 120-V (rms) AC line, first the voltage is dropped to 7.5 V (rms) AC by a transformer, and then the 7.5 V AC is converted to 7.5 V DC by a rectifier circuit involving diodes. Consider a device of resistance 15 Ω connected to the 7.5-V DC output of the rectifier. Again assuming no power loss anywhere, what is the rms current, in milliamperes, in the primary winding?The Single-phase HW Rectifiers with R, L with free while diode find the value of Voltage and Currents (output do and Root Mean Square) with all the proved, then sketch the curve from 0-2 on these axes (vs, VL, VD and it) explain its operation.