The 555 timer connected in the monostable multivibrator mode: a) Design the circuit to provide an output pulse 60 seconds wide? b) Determine the recovery time? Take: B = 100

4. The LM317 is an example of an IC A. three-terminal negative voltage regulator B. variable positive voltage regulator C. fixed positive voltage regulator D. switching regulator 5. Analog multiplexer called time-division multiplexer because of: A. It required fixed time period to operate. B. The signals are time overlapped throughout the output. C. The MOSFETS turning on and off half of the time. D. The input signals are time variants. 6. The basic difference between a series regulator and a shunt regulator is: A. the amount of current that can be handled B. the position of the control element C. the type of sample circuit D. the type of error detector

a. What are DC Choppers? Explain what TRC (Time Ratio Control) is b. A Buck Converter is used with a 2mH inductor and a supply voltage of 15V. The load resistance is maintained at 1 Q. The switching frequency is 100 kHz. i. Determine the duty cycle needed for an output voltage of 5V. ii. Calculate the output supply voltage ripple. iii. What are the consequences of decreasing the load resistance by 50% (to 0.5 ohms)? c. Identify the class of converter in the figure and describe the principle of operation of such a converter. d. State a possible application of such a converter. e. Draw the output waveforms of the current and voltage and the gate pulses of the choppers. Indicate on the current waveform the region of operation of the choppers and diodes. CH₁ CH₂ AD₂ Chopper wwwroo E +← Vo

c) A buck converter with constant frequency peak current mode control has Vs = 28V, V = 20V, L = 301uH, fs = 100 kHz. Find the ramp slop for the optimum compensation and the peak compensation voltage. %3D

Describe Amplitude Modulator as one of an OTA applications       the subject : Analogue Electronics II please wright clear and explean.

8. Consider the DC motor with H-bridge PWM power amplifier that operates at frequency Fs = 1 kHz. Rated voltage of DC power supply is Udc = 24 V. Reference signal Uc = 0.5. Find the duration of the positive pulse in ms. a) 1 b) 0.5 c) 0.75 d) 0.25

Sketch and explain the output for the circuit of given parameters. The generator signal is a sine wave with a 10V peak. The diode is germanium and has a forward resistance rf of 25 ohms. (Using Third Diode Approximation)

What value of filter capacitor is required to produce 1% ripple factor for a full-wave rectifier having a load resistance of 1.5kN? Assume that the peak value of the output voltage is 18V.

Does a truvox 1225 woofer have a fast QTS?

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