An earthed line in a split power supply refers to the connection of the power supply's negative terminal to the ground or earth. This is important in op-amp circuits as it provides a reference point for the voltage levels.
An earthed line is necessary in a split power supply for op-amps because it provides a stable reference point for the voltage levels. This helps in maintaining the accuracy and stability of the op-amp circuit.
If the earthed line is not connected in a split power supply for op-amps, the voltage levels in the circuit will not be stable or accurate. This can lead to errors or malfunctioning of the op-amp circuit.
The earthed line should be connected to the ground or earth point of the circuit. This can be achieved by using a wire or a dedicated ground terminal on the power supply.
Yes, the earthed line can be shared among multiple op-amp circuits in a split power supply as long as the current requirements of the circuits are not exceeded. However, it is recommended to have a separate earthed line for each op-amp circuit to avoid any interference or crosstalk between the circuits.