A second order instrument is required to measure the input signals up to 100Mz with an amplitude inaccuracy of less than 1%. Calculate the natural frequency requirements, if the damping ratios are 0.3 and 0.6 respectively. Determine the phase shift in each case at 50 and 75Hz

Q2 It is proposed to improve the bandwidth of a piezoelectric accelerometer by increasing the damping by means of a circuit arrangement. Develop a circuit configuration (passive or active device) that will perform the required function, and deduce the side effects of introducing such a system?

(b) The temperature of an oven is raised at the rate of 200 degree C per hour. For the condition that the indicating instrument must not show an error more than 5 degree C, what is the maximum permissible time constant?

(b) Design a simple power factor meter to operate from 230 V mains. Current range=1 to 10amps; Power factor range: 0.4 to 1?

Q6 What is meant by normal mode rejection? An A/D converter has 20ms integration time. What is the normal mode rejection offered by this ADC for signals having frequency of (i) 150Hz (ii) 145Hz?

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