I am trying to make a 30 GHz 32 (or 64 bit) counter on flip flops.
Ready counters do not satisfy me due to max frequency and price, so I decided to make it on my own from flip-flops.
Ready flip-flops also do not satisfy for the same reason, so I decided to make flip-flops from ready NAND elements.
NAND elements also are pretty slow, so I decided to own NAND elements from transistors, diodes and resitiors.
There are resistors with satisfying operating frequency, for example, this one with 110 GHz.
30 GHz has about 33 ps period, however the fastest diodes I found have only 1 ns. I typed “switching”, “fast”, “ultrafast diodes”, but the minimum one is 1 ns.
I probably can use transistor as diode, but maybe there are, perhaps even more faster diodes, and I just searching wrong?