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Hi SunnySkyguy,
HVDC max =400V
As for other details as attached
View attachment 119730
In post #1 i meant to say high attenuation not high gain by the way.
I have tried other designs with LC low pass but I has issues with using the T-shaped low pass filter that the VDSL signal would not work because there was a direct short to ground with the caps needed for the 1Khz signal.
Ok the next spec required is source , input, output and load impedance over entire range of audio and VSDL to avoid interference.
assume it is high impedance above 50MHz but need to know impedance to avoid resonant, same with Csource =? in audio at 1Khz
.Until you define source and load impedance, I assumed Cin, Rin and Cout and the rest was added to meet your requirements
I do not have much room to play with so 100mH will be way out of the question100 mH is rather large
A series LC acts as a bandpass filter. It blocks DC.
your specification which was yet clearly given.
source , input, output and load impedance over entire range of audio and VSDL to avoid interference.
You should add realistic line impedances to your simulation, otherwise the results won't have much to do with real live. Why did you select 50 ohms load impedance?
Exactly this. Let's assume 10 kHz cut-off frequency is O.K., also third order slope (18 dB/octave), then acceptable passband ripple/gain deviation should be specified.What more is needed from posts #1, and #3???Apart from what SunnySky mentioned?
I agree that 50 ohm load impedance is a reasonable choice, but only if the source impedance isn't much greater than 50 ohms. This won't be the case for a telephone line. Load impedance must be known for an exact calculation of filter characteristic anyway.