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Only 8 transistors, and is quite stable! Works even at frequencies as high as 250 MHz using 100 Ohm resistors -(according to simulation).
Set Up & Operation:
1. Use the push button on the right to drive the two SR transistors in opposite states (This is necessary to simulate real world starting conditions, normally due to impurities that are inevitable in the real world, yet not accounted for in EC, it’s required for the circuit to function because of this)…
2. Then simply use the left push button as the input! Or flip the SPST switch to use the frequency source as the input.
Notes:
1. Please be aware that the simulation speed greatly impacts the performance of any circuit you simulate in EveryCircuit. In this example, the sim speed is set to be pretty fast so it can simulate operation at much higher frequencies, if you want to accurately judge the performance characteristics of the T Flip Flop using the push button as an input or the frequency source at lower frequencies as an input, you must adjust the sim speed to be closer to real time (For Example: adjust it closer to milliseconds or 1 second, instead of at nano or micro seconds)
2. For some strange reason, the input in this simulation requires a specific voltage range to toggle properly also, which seems to be between about 3 and 4 volts logic HIGH while using 1k Ohm resistors (yet this limitation doesn’t apply for a push button, probably cause it’s floating when it’s not pressed, but not totally sure on that), and will work with as low as a 1.5v logic HIGH while using 100 Ohm resistors for Higher Frequency operation. The voltage level does seem to also depend on the frequency a little bit. Not exactly sure why the HIGH driving voltage level matters this much yet, but when I figure it out, I’ll update it in the description here.
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