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Grounds are always present. Even in a dual supply circuit with +15v/-15v power supply we still need a ground. The question is WHY?
This question is raised in my mind especially because, battery powered circuits do not have a ground. You may say that we need all voltages with a reference point but what does it happen to be the earth itself? Why can we get away without having one in battery powered circuits?
This question is raised in my mind especially because, battery powered circuits do not have a ground. You may say that we need all voltages with a reference point but what does it happen to be the earth itself? Why can we get away without having one in battery powered circuits?