Hi, How can one generate j*coswt in the lab from coswt available in single physical wire? Please note that intention is to multiply both positive and negative frequency content with +j. I am not asking about hilbert transform which is -90 degree phase shift and rotates positive frequency content with -j and negative content with +j. Also, I am not asking about a anticlockwise phasor rotation of 90 degree or phasor multiplication by +j because phasor is e^jwt and not coswt. Is it necessary to have 2 physical wires and force orthogonality?