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Friday, 2 March 2012

What is the matter with the Ground symbol? How is it being relate to the actual circuit built?

This is a tough one. The symbol is a must for PSPICE simulation; it is called “Ground” or “Circuit Common”.

It is a confusion that takes me years to get it right. For beginner, just take it as all nodes connected to this symbol being electrically joint up through wires – the trick is to acknowledge that wires are not perfect conductor, they has resistance, inductance…

To give you a feel on how real world’s “Ground” connection like, refer to the schematic diagram below – the black wires are the so called “Ground”, and in diagram below “Star Ground” connection is being used, however, this is usually not the case:

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