I am facing a challenging problem with a circuit that I am currently working on, I would like others input and thoughts.
I have a DC power signal that I am injecting a AC small signal this mixed signal is transferred over two conductors to a receiver circuit which then uses the DC power signal to power a load and also extracts the AC small signal for use.
Description of signals:
DC Signal: 30V generated by a boost converter that has noticeable amounts of noise under the working load of 500mA to 1A
AC Signal: ~2vpp @ 1MHz to 30MHz
This is not an overly complex challenge given ideal components, however the real challenge I am seeing is the inductors sized to carry the currents required have a self resonant frequency typically <2MHz. From my understanding this means that they would not act as good filter component for the higher frequency AC small signal causing excess loading of the AC signal and a diminished signal at the receiver.
Very much looking forward to other's thoughts and opinions on the problem.