A MOSFET operated as a switch as shown in Figure 4.3 permits a digital signal operating at very low current levels to control comparatively high- level current devices such as a light-emitting diode (LED). VG IG VDD RD ID LED VD Figure 4.3: Circuit for Problem 4.3 Analysis a. Determine IG, VD, and ID when VG = 0 V. The MOSFET is in what operating region? b. Repeat for VG = 3.3 V.

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?

4.69 A full-wave rectifier circuit with a 1-k2 load operates from a 120-V (rms) 60-Hz household supply through a 5-to- 1 transformer having a center-tapped secondary winding. It uses two silicon diodes that can be modeled to have a 0.7-V drop for all currents. What is the peak voltage of the recti- fied output? For what fraction of a cycle does each diode conduct? What is the average output voltage? What is the average current in the load?

Please all subpart is compulsory Either dislike Please all subpart in typing format

1. For a 60Hz, 9Vms AC input, with 250 Ohms load, determine VDc across the load, for FWR power supply, (show the required circuit). Draw the waveform on the load. 2. If C=200uf, filter capacitor is applied across the load: Calculate Vpp ripple and VDc, for the load. 3. Determine PIV on the diodes 4. If one of the diodes become open, what would be VDc and V, load. across the load, with & without capacitor. Draw the waveform on the fms,

4.69 A full-wave rectifier circuit with a 500-2 load operates from a 120-V (rms) 60-Hz household supply through a 6-to-1 transformer having a center-tapped secondary winding. It uses two silicon diodes that can be modeled to have a 0.7-V drop for all currents. What is the peak voltage of the rectified output? For what fraction of a cycle does each diode conduct? What is the average output voltage? What is the average current in the load? Hint: the average output voltage can be obtained by using the equation below (see plots below too), but you will need to find out the conduction angle 0 first. T-0 1 - | (10/Zsinp – 0.7)dø v0,avg D1 Us, Vo (V) 6:1 Us 10 V 10 Vans C0.5 k2 0.7 v- 120 Vrms T-0 60 Hz D2 10 Vns mm

7. Real diode limiter For the limiting circuit below, the diode is the same as in question 6. For each of the four Vout values from Q6, calculate the the Vin values. Remember to account for the voltage drop across the resistor. Note that in these circuits with an input and an output, the input can source current but no current flows to the output unless an explicit load resistor is shown. 1 k Vin Vout

Helli. I only need the last part. Plotting power vs voltage if used as a solar cell and give the definition of  fill factor. Tnx

Consider the circuit given in Figure (Q4). Let V, = 0.8 V and R = 100 0, find: a) The value of C that results in a ripple voltage not larger than 1 V peak-to- peak. b) The DC voltage at the output c) The current through the load d) The diodes' conduction angle D, 12V (ths) 6. HZ R + Figure (Q4)

Problem 2. In a typical MOSFET structure with a p-Si body, the Drain/Body and Source/Body regions are comprised of pn- junction diodes because the Drain and Source electrodes are attached to the p-Si body layer through a small island-like region of n-Si. If these n-Si regions were not present, describe what would happen if you tried to measure the channel current between the Source and Drain electrodes in this device (assuming the gate voltage has properly created an inversion channel)?