We want to bias up a 3-stage 20 GHz distributed amplifier. It's tricky and the chip costs $150, so we don't want to blow it up. A good drain source might be a 50 ohm resistor from +16 volts, but clamped to +10 just in case.
This does it:
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If K=1+R3/R2,
Reff = K*R1
Veff = K*1.25
and it clamps when the reg runs out of swing.