AdamTH
Newbie level 4
Hello,
I stucked during my project looking for proper solution. From simplified schematic below, L1 and L2 are my antenna (L1 = L2 and L_antenna = L1 + L2), and I want to switch tuning capacitance with my two N-MOSFETs driven by digital logic. Digital logic is supplied from same antenna circuit with full-bridge rectifier, however now the issues appears. I can't directly connect antenna virtual ground to digital ground in that layout. I'd like to avoid using two half-wave rectifier due to lower voltage amplitude in that solution. Do you have any clue how can I drive MOSFETs with that kind of layout or how to solve it other way?
I stucked during my project looking for proper solution. From simplified schematic below, L1 and L2 are my antenna (L1 = L2 and L_antenna = L1 + L2), and I want to switch tuning capacitance with my two N-MOSFETs driven by digital logic. Digital logic is supplied from same antenna circuit with full-bridge rectifier, however now the issues appears. I can't directly connect antenna virtual ground to digital ground in that layout. I'd like to avoid using two half-wave rectifier due to lower voltage amplitude in that solution. Do you have any clue how can I drive MOSFETs with that kind of layout or how to solve it other way?