Explanation: The output frequency fo = 1/2RC×ln [ (2R1+ R2)/ R2] = 1 / {(2×33kΩ ×0.33µF)×ln[(2×33kΩ +30kΩ)/30kΩ]} = 1/ (0.02175×ln 32) = 39.47 Hz. 8. The value of series resistance in the square wave generator should be 100kΩ or higher in order to
A. Prevent excessive differential current flow
B. Increase resistivity of the circuit
C. Reduce output offset voltage
D. All of the mentioned
Answer:A
Explanation: The output frequency fo = 1/2RC×ln [ (2R1+ R2)/ R2] = 1 / {(2×33kΩ ×0.33µF)×ln[(2×33kΩ +30kΩ)/30kΩ]} = 1/ (0.02175×ln 32) = 39.47 Hz. 8. The value of series resistance in the square wave generator should be 100kΩ or higher in order to
A. Prevent excessive differential current flow B. Increase resistivity of the circuit C. Reduce output offset voltage D. All of the mentioned
Explanation: In practice, each inverting and non-inverting terminal needs a series resistance to prevent excessive differential current flow because the inputs of the op-amp are subjected to large differential voltages. 9. Why zener diode is used at the output terminal of square wave generator?