Ring oscillator

215

04:30:20

I've seen it often enough with logic gates, I thought I'd try it with BJTs.

published 7 years ago

qassis

7 years ago

simple, elegant, love it. Thanks for sharing.

eekee

7 years ago

o! thank you :)

jason9

7 years ago

If you remove the capacitors and increase the voltage a bit it goes into the FM range. It also works as an amazing FM transmitter. The voltage seems to correspond directly to frequency such that f=Vn where f is frequency, V is voltage, and n is some constant defined by the exact parameters of the components.

sshsslfun

7 years ago

Neat👌

eekee

7 years ago

@jason9: I noticed the frequency depends on the voltage. It's good to hear it's linear. :) In fact, the frequency depends on the R-C time constant and the transistors' switch-on threshold, so perhaps linearity should have been expected. I suppose the Early effect might modify it a bit. In the absence of capacitors it will use the transistors' internal capacitance, 5pF.

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