Q3. State the main advantages and disadvantages of the dual-slope ADC circuits.

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Q3) For three-phase fully-controlled bridge rectifier circuit with highly inductive load( load current is continuous and level): 1-Draw the circuit. 3- For firing delay angle of 30°, draw the waveforms of ve, i, is, and i..

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A single phase, fully controlled bridge rectifier supplies a series connected resistor- inductor load (R = 20, L = 0.02H) from 220V, 50HZ AC supply. The triggering angle of the thyristors is 60°. (Assume the circuit is ideal.) a. Sketch the circuit. b. Develop the load current expression and check the continuity of the load current. c. Sketch the load voltage and load current waveforms. d. Calculate the mean values of the load voltage and load current. e. Sketch the inductor voltage and calculate its mean value. f. Calculate the FF (form factor) and RF (ripple factor) of the load voltage.

In a temperature measurement system the element A receives the temperature value and produces millivoltage as the output. This output is given to an element B. The element B increases the millivoltage value into voltage value. Then it is given to element C. The element C converts the analog voltage into Digital value .The element D displays the output. Identify the elements A, B, C and D used in the above mentioned temperature measurement system.

Discussion: 1. Discuss the obtained curves. 2. What are the advantages of using cascade voltage regulater circuit? 3. To stabilize a voltage of 65 V, one can: a. Use one 65V zener diode b. Use ten 6.5 V zener diodes in series If the costs are irrelevant, then which solution is best and why? I R. (A I O Vin v)Vout Figure (5.2) A stabilizer circuit with variable power supply. IL V (V) Vout RL Figure (5.3) A stabilizer çircuit with variable load.

3.16 A three-phase, full-wave half-controlled rectifier bridge circuit is operating at a delay angle a = 67° when supplying full power. The per-phase inductance of the coupled transformer is 2 mH. The input voltage has an rms magnitude of 230 V per phase at 50 Hz. The load current in the d.c. side is 15 A at 200 V. It is required to: (a) Obtain the drop in the d.c. voltage due to current overlap. (b) Calculate the rms secondary voltage of the transformer. (c) Calculate the overlap angle. (d) Obtain the recovery angle while the converter in operating in the inversion mode with 15 A, 200 V d.c. input. (e) Obtain the firing angle for the conditions in (d). [Ans: (a) 4.5 V, (b) 450 V, (c) 1.06°, (d) 67.14°, (e) 111.8°]

Design a 15 V Zener regulator for the following conditions: 1) The load current IL ranges from 200 mA to 300 mA.2) The source voltage ranges from 21 V to 25 V. Based on your design results,a) Draw the Zener regulator circuit.b) Calculate the power ratings for both Zener diode and resistor Ri

1) a) As depicted in the figure, input voltage is 120 Volts (RMS) and diode drops are 0.7 Volts. Design this circuit with given two ac outputs and calculate turns ratio of live transformer. voltage i) 10 V ii) 100 V 2) b) Consider a circuit using Si diodes and 10 k ohms resistors. Design this clipper circuit with output ranges below; i) -0.7 V and above ii) +2.1 V and above iii) +1.4 V c) As given in the figure a clamper circuit with the input +10V- signal Vi is proposed to design. Determine the output voltage with the exact solution step by step. Sketch transfer characteristic Vo versus V₁. V₂ Vo H 2RS -10V- -2√ 01 Vo Trims