1. A "1" signal is required to trigger an alarm, if the fluid level in a tank is more than 3m deep. The level sensor gives an output of 9.3mV for every centimeter increase in depth. What is the required alarm voltage?
2. In problem 1, if there are waves with amplitude of 35 cm due to pumping, what is the value of R2 to give a dead band with a 5-cm safety margin to prevent the comparator output from going low? Assume R1 = 5k ohms, and output high = 5V.
3. An 8 bit DAC has a reference voltage of 5V. What would be the voltage corresponding to a binary word of 10010011?
4. What is the conversion time for the dual slope converter shown in the figure below if R = 1M ohm, C = 5nF, VR = 5V, integration time of 50 ms, and the input voltage is 8.2V? What is the capacitor discharge time?
5. A temperature between -10 and +250 is converted into a 0- to 5.0 Volt signal. This signal is fed to an 8-bit ADC with a 5 Volt reference. What is the actual measurement range of the system? What is the resolution?