I'm considering switching options for an HF (3-15 MHz) tuner network. Pin diodes are interesting but their surrounding control circuitry is somewhat inconvenient, and they require relatively high power to run.
I'm reading on RF JFETs. Both generic JFET guides and specsheets for RF JFETs such as the J211 suggest that Vgs must be negative, which would require the addition of a negative power supply.
Can I get around this by connecting the N-channel JFET as I would a P-channel common-source MOSFET? Source to Vdd, gate to a TTL-level control line and drain down to a load. This would not require an additional negative power supply.
From dialogue it sounds like I need to move from this (please pretend the MOSFET is a JFET) :