I am building a MOSFET bridge to make sure my signals arrive at the load in the proper polarity regardless of the input polarity. My problem is the \$V_{gs}\$ voltages on the MOSFETs are at or exceed 20 V, this is the maximum \$V_{gs}\$ MOSFET I can find. What can I do to lower my \$V_{gs}\$ while still passing 11 V signals and having the proper MOSFETs turn on/off at the right times?
Here is the circuit. Battery voltage is 11 V, and op-amps are ±10 V, any lower on the op-amps causes MOSFET M3 to saturate.
EDIT: added a more clear schematic. N-channel MOSFET \$V_T=1\$, p-channel MOSFET \$V_T=-1\$. Link to the online circuit simulation simulation
I need to keep my \$V_{GS}\$ below 20 V, and the opamp rail voltages must be equal between opamps. The voltage source can swing between ±10 V. The common is always common, so just put a negative voltage into the value box on the simulator.
Best Answer
Maybe you can use a full wave opamp rectifier instead of your MOSFET matrix.