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Consider the switched−capacitor circuit in Figure 15.12(a). (a) if theclock frequency is
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Microelectronics: Circuit Analysis and Design
- A boost converter is required to have an output voltage of 8 V and supply a load current of 1 A. The input voltage varies from 2.7 to 4.2 V. A control circuit adjusts the duty ratio to keep the output voltage constant. Select the switching frequency. Determine a value for the inductor such that the variation in inductor current is no more than 40 percent of the average inductor current for all operating conditions. Determine a value of an ideal capacitor such that the output voltage ripple is no more than 2 percent. Determine the maximum capacitor equivalent series resistance for a 2 percent ripple.arrow_forwardd) Design (Find the values of the R₁, R2, and C₁) an astable multivibrator circuit to have an output waveform as shown below in the figure (tH = 375µs and t₁ = 125µs). (Assume C₁ = C₂ and R₁ # R₂) and determine the frequency of oscillation and the duty cycle. R1: R2 C1 Q Vcc 4 555 5 C2 10nF I 8 1 3L -OVO tH = 375.0us tL = 125.0usarrow_forwardC'uk Converter Design A C'uk converter has an input of 12 V and is to have an output of - 24 V supplying a 60 W load. Select the duty ratio, the switching frequency, the inductor sizes such that the change in inductor currents is no more than 12 percent of the average inductor current, the output ripple voltage is no more than 1.5 percent, and the ripple voltage across C1 is no more than 3 percent.arrow_forward
- A boost converter has an input voltage Vb=5V. The average load current is lo=0.5A. The switching frequency is 25 kHz. Suppose that a regulator is added (L=0.15 mH and C=0.22 mF) and that the current is continuous. If the average output voltage is Vo =15V, then the ripple current of the inductor delta() is equal to: Select one: a. 1.41A b. 0.56A O c. None of these d. 0.89Aarrow_forwardThe inductor current of a buck-boost converter is shown in the figure. The minimum inductor current is zero and the peak value is 5A. The load resistor 5 A value is equal to R=702 Assume that the output voltage ripple is 1%. All components are ideal. Determine. a) Duty ratio. b) Output voltage. c) Input voltage d) Inductor value e) Capacitor value. 12μ 20μ 32μ 40μ t,secarrow_forwardA step down converter has a load resistance R-0.50hms. an input voltage Vs-200V and a battery voltage E-20V. The average load current la=250A and the converter frequency is 400 Hz. The value of the inductance L that would limit the maximum load ripple current to 5% of la, would be equal to: Select one: O a. 9 mH O b. None of these O c. 26 mH O d. 15 mHarrow_forward
- A voltage commutated chopper operating at 1 kHz is used to control the speed of dc motor as shown in figure. The load current is assumed to be constant at 10 A. 00000 V = 250 V 1₁F XA vous 2mH The minimum time in uses for which the SCR M should be ON isarrow_forwardThe clamping circuit clamps or shift the input sinusoidal signal up or down. Farrow_forwardI want to design an oscillator for a PWM supply. It will run with a square wave of 75 KHz. Voltage is 15VDuty Cycle about 50%. Hint: Choose values of resistor, and then calculate capacitor for the frequency. Draw the circuit. Show the calculations.arrow_forward
- A boost converter is required to have an output voltage of 8 V andsupply a load current of 1 A. The input voltage varies from 2.7 to4.2 V. A control circuit adjusts the duty cycle to keep the outputvoltage constant. If the switching frequency is 200 kHz, determine:i. a value for the inductor such that the variation in inductorcurrent is no more than 40% of the average inductor current forall operating conditions.ii. a value for the capacitor such that the output voltage ripple isno more than 2%.iii. in case the OFF period is reduced by 30% for constantfrequency operation, find the new output voltagearrow_forwardAn RL load (R=0.2 Ohms, L=10 mH) is controlled by a converter. The supply voltage Vs is 600V and the chopper frequency is 200 Hz. The maximum peak to peak ripple current is equal to: Select one: a. 30A b. 55A c. 90A d. 75Aarrow_forwardR +Vcc -Vcc C Vout R R a. Quantify how the resistors and the capacitor influence the output voltage of the circuit, Vout. What are the upper and lower limits of Vc? b. Howlong does it take for the capacitor to be charged from minimum to maximum voltage and vice versa?arrow_forward
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