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Hans-Werner Hilse wrote: |
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> In theory, for the one transistor and one cap case, you have a loaded |
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> cap that will take "forever" losing its load, won't it? But in |
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> practice, I think, that's not realistic. |
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It's actually not theory vs. practice. Even in theory, it's not just a |
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cap, it's a cap and a resistor. So you have a time constant, tau = |
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R*C. Since the capacitance is very small (picofarads) and we're not |
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talking large resistance either, you end up with a very small time |
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constant and that cap leaks its charge very quickly (which is why the |
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RAM needs to be refreshed and powered). |
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-- |
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R |
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-- |
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