1. Answer the following questions: (25 maks) (a) Briefly dessribe the peoperties
ID: 1766101 • Letter: 1
Question
1. Answer the following questions: (25 maks) (a) Briefly dessribe the peoperties of the common used Sther pypesHwso denermine the cutoff frequency of a low pass fher? (b) Why volage followers are generally sed in ser procondisioning devices with sensing units and amplifiers? 2. The measurements in a data setaee sujected so random emoes but it is known that the das set fits a Gaasian distribution.lf tsthe suedard deiton ofthem ou_.swer the following questions: (a) Desermine the percentage of measurements tha liewhn the boundaries of to und 3, respectively (b) Usc ±3aasan eurple to explain results.esturks) decays with time (r) according to the relatintig!' . Kepr. Erste values fr K and r if the following values of F and ane measured Esimate the output voltage when a displacoment of 4.5 em is measured (25 marks) 867 655 129 256 195 140 104076 4. Figure 1 shows an Op-Amp cincuit of an amplifier Amwer the Scllorming quesitions (a) Derive the output voltageif the input voltage is Page 2 of 3Explanation / Answer
1 Q
The filters are used to eliminate the unwanted signal components in a signal.
A filter is commonly has two properties.
1. Cutoff frequency
Cutoff frequency decides the filter frequency selecting range.
2. Gain
The gain of the filter is used to amplify the weak signals
Commonly used filter types are;
1. Low pass filter
2. High pass filter
3. Band pass filter
4. Band stop filter (narrow band filter)
b.
Voltage followers are having unity gain, high impedance and low output impedance.
The input impedance of the voltage amplifier matches two unequal impedance networks.
The output impedance of voltage follower avoids the loading effect of the system.
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