Prelab 9 Santiago Tovar

3. An essential part of an AC-DC power supply circuit is the filter, used to separate the residual AC (called the "ripple" voltage) from the DC voltage prior to output. Here are two simple AC-DC power supply circuits, one without a filter and one with: Plug unfiltered Plug Filter Vatered Draw the respective output voltage waveforms of these two power supply circuits (unfiltered versus filtered). Explain why that type of filter circuit is needed.

(a) Explain the function of a high pass filter. Draw a diagram of a simple high–pass filter using a capacitor and a resistor.

1. The purpose of the Lag Compensator is: I. Improve the study state response of the close system. II. Speed up the transit response. III. All the above. IV. None of the above.  2. In the Lead Compensator:  I. Z > P. II. Z < P. III. Z = P. IV. None of the above.

5. Calculate the rms ripple voltage at the output of an RC filter section that feeds a 1.2 k ohm load when the filter input is 60 volts de with 2.8 Volts rms ripple from a full wave rectifier and capacitor filter. The RC filter section components are R = 120 ohms and C= 100 uF. If the no-load output voltage is 60 volts, calculate the percentage voltage regulation with a 1.2 k ohm load.

What are the advantages and disadvantages of capacitor filter?

For the buck-boost converter has an input of Vs= 12 V. The duty cycle k= 0,25 and the switching frequency is 25kHZ. The inductance L= 150 uH and filter capacitance C=220uF, The average load current Is = 1,25 A .Determine the following: 2.1 The average output voltage Vs 2.2 The peak-to peak output ripple Vc 2.3 The peak-to-peak ripple current of inductor I 2.4 The peak current of the transistor Ip 2.5 The critical values of L and C

iii and iv please

Give an example of an analogue device that can be used as a phase comparator in a PLL system and explain its operation.

1) a) A 1V 5 kHz signal is put into a low pass filter with a cut-off frequency of 2 kHz. What will the  frequency of the output signal be?  b) A 1V 15 kHz sinewave signal is put into a low pass filter with a 2 kHz cut-off frequency. The output signal will have how much amplitude approximately?

If a positive change in modulation signal level of 200 mV will cause a positive frequency deviation of 10 kHz, what I be the frequency deviation for a negative change of 100 mV in the level of the modulating signals? (Ans:-5kHz)

Q. No 1. For the given analog signal, follow the proper steps to convert this signal to digital signal. (Take voltage levels L = 8, n= 3). Also assign proper coding to each voltage level and draw the resultant digital waveform for the given analog signal. Sample times Arnalog imput Time