Looking for advice on how to build an adjustable voltage translator. Input is standard 1V8 logic, but output HIGH is in a selectable range of +3 to -3V, while output LOW is way down in a selectable range of -15 to -21V.
Cannot find any any off-the-shelf solutions to this. Input frequency range on order of 100k square, output needs to drive upwards of 100pF. Opamps are likely to be unstable at this voltage and cap load. Ideas on types of circuits that can be used here?
Output side IO levels are supplies that can be set on-the-fly during operation, so the level translator needs output compliance in the shown ranges. They don't track, they are individually setable. Fast enough slew needed to reliably operate at 100k given the output swing.