Question

Question 4 (8%) The potentiometer circuit shown in Fig. 3 is used to measure angular position 0. The capacitor C is used to reduce contact bounce, and the op-amp isolates the potentiometer from long lead wires and recording instrument resistance loading. The potentiometer being used rotate 320 degrees has a resistance Rp 4.0k2, and is capable of dissipating 0.02W of power in most environments. The circuit is to have a minimum sensitivity of 10.0mV/degree when 100m of AWG28 copper lead wire (222/100m) is being used. Please 1. Determine the maximum voltage that can be applied to the potentiometer 2. Determine the value of series resistor Rsin order to protect the potentiometer if V,-15V 3. Determine the equation for the output sensitivity S 4. Select the values of RM and R, to achieve the desired sensitivity if V,-10V. Rs 01 Vs RM Vo Rw Fig. 4

Answer 1

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