We TTLers love to test technologies, play with parts and explore new (or old !) realms. And one of the first things we do when we get our hands on a new transistor is see how fast they can go !
#Ring Oscillators: Fairchild DTL 949 by @Dana Myers
CBJT ring oscillator by @Ted Yapo
Relay ring oscillator
I2L ring oscillator by @Dana Myers
2N2369 ring oscillator / #Discrete Bipolar Logic (RTL/LTL) / Speed optimisation of pmbt2369 ring oscillator by @Tim
LTL ring oscillator by @Tim
Emitter-Coupled Logic ECL ring oscillator by @Dana Myers
74AC02 gated ring oscillator by @Ted Yapo
BC548B 5 Stage Ring Oscillator by @agp.cooper
Ring oscillators on Silego GreenPAK 4 by @whitequark ...
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These days I'm contemplating "tasting" BFP740 (44GHz GBW but not in stock so far) and 2N2369 gates (I have a fistful but not enough to make anything interesting)...
I propose to create a new project/page where we gather all the ring oscillators experiments, sort them by technologies, discuss on measurement details (and gotchas) and agree on a standard "size" to help tally and compare speeds, efficiencies etc.
I was thinking that with my BFS480 (rated at 7GHz) I would need 9 inverters in series to have a reasonably observable waveform and a frequency that my HP5335A could accurately follow.
Is anybody interested ?