In parallel LC filter, what is filtered, voltage or current?
Assuming that all components and wires are ideal, with zero internal resistances.
In the picture, Vin = Vout at all times, right?
Now consider two extremes:
From two cases above, Vin is not always equal to Vout. I don't understand why.
Assuming that all components and wires are ideal, with zero internal resistances.
In the picture, Vin = Vout at all times, right?
Now consider two extremes:
- If Vin is a DC constant voltage source, zero frequency. Vin = V = constant ≠ 0, L behaves as a short circuit and C as an open circuit. The equivalent reactance of LC will be zero and therefore, Vout= 0
And we have Vout = 0 ≠ Vin = V = constant ≠ 0 - If Vin is a sinusoidal voltage source with infinite frequency, and non-zero amplitude. L behaves as an open circuit and C as a short circuit . The equivalent reactance of LC will be zero and therefore, Vout= 0
And again we have Vout = 0 ≠ Vin ≠ 0
From two cases above, Vin is not always equal to Vout. I don't understand why.
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