HF RF multivibrator capable of providing high current?

[neazoi]

Is a HF RF multivibrator capable of providing high current?
Any circuits for such a multivibrator on HF or another one that can provide a high current?

I need a simple oscillator on HF (0.5MHz up to 5MHz max) that can provide lots of current for a few experiment of mine. Voltage is not critical as long as it can provide something like 1-5v or so, but it has to be able to provide some current. This will be used as a source of DC after rectification by a diode and a shunt capacitor. I know it is inefficient, but this is the case here.

 

[KlausST]

Hi,
I repeat: "high current", "high current", "high current", "lots if current", "some current"
But what does this mean?
Without a value it is meaningless. For one 20mA is lots of current, for the other 200A is low current.

Klaus

 

[FvM]

I read "multivibrator" as synonym of square wave generator. A usual lab generator has a real output impedance of 50 ohms. Which output impedance do you want?

 

[BradtheRad]

Astable cross-biased H-bridge oscillates after adding one capacitor in a strategic spot.
Frequency is influenced by a combination of load, cap value, supply voltage, bias.
Oscillations die if the load tries to draw too much current.

I made it work at low power.
The simulation shows 1.8V supply, load 0.7 ohms, frequency 5 MHz.
Load gets 2A.
Of course there's no guarantee you'll obtain identical performance.

 

[Easy peasy]

look up Royer converter - you can then make your own rectified current source as you require it ...

 

[neazoi]

Thank you all for your replies!