yellow = input
blue   = output
eine komplette Phase des Ring-Oszillators entspricht 2 * 3 = 6 Gatterdurchläufen.
DUS = Silizium-Schaltdiode zwischen C und B als Saturation Ableit-Diode
BAT = Shottky-Diode BAT43  am Eingang

Transistor:
BC546
    CDIL      1.16¢
	fT		 = 300MHz @ 10mA
	Cob		 = 3.5 < 6pF
	Cib		 = 9pF
	Vce(sat) = 90 < 250mV @ 10mA
	Vbe(on)	 = 0.58…0.7V @ 2mA

Shottky-Dioden:
BAT43
	1.84¢	ST
	Vf		0.26V … 0.33V @ 2mA
	C		= 7pF

Variation von Pull-up:   1k … 4k7
Variation von Vcc:       1V … 5V

--> https://docs.google.com/spreadsheets/d/1IbnSQMwQQL5VwX1Y5an6ctP1EsdFWHL6ajAt4p-tM00

It's all about current: sort table by collector current I(C) and compare to frequency.

8 MHz achieved with I(C) ~ 1mA:
	1.5kΩ @ 2.00V, 3.2W
	1.2kΩ @ 1.65V, 2.5W
	1.0kΩ @ 1.45V, 2.2W


INFO:

BAT43 Vf:
	0.25mA	236mV
	0.5mA	255mV
	1.0mA	275mV
	1.5mA	287mV
	2.0mA	296mV