RC Circuit

[raburgeson]

What is the best and cheapest way to beat a square ware out of a rc circuit? Looks like the best way to lick some getting to the frequency problems. Transistors are to slow and weak there has got to be another way.

[dingbat]

rc circuit is no way to produce a square wave.  rc circuit is by nature a filter.  a filter will destroy square waves, not make them.

[hartiberlin]

Get a 4069 hex Schmitt Trigger inverter IC and then you only need
one RC unit to build a working square wave generator.

[gyulasun]

What is the best and cheapest way to beat a square ware out of a rc circuit? Looks like the best way to lick some getting to the frequency problems. Transistors are to slow and weak there has got to be another way.

Hi,

If you are happy with about 4nsec rise and fall times, then consider building this simple circuit from EDN magazine Design Ideas section, see the attachment . I mean the second article "High-speed pulse generator has programmable levels". 

Sorry if this circuit is totally different from your original imagination (you have not included much detail on your square wave needs).

Regards
Gyula

[raburgeson]

I'm sorry, I'm trying to switch 40,000 VDC at a high frequency and was thinking about Tesla and cheap switching but then he used the sawtooth and I need the square wave. I only need a wave square enough to generate harmonics and am hoping someone thinks of a way I've forgotten about.