betwixt said:If you don't want to use an amplifier you are asking for a VERY high powered oscillator that can drive a 100V sine wave into 100Ω over more than 25% of it's tuning range.
Good luck with your search, please don't switch it on in Europe, it would be too close to me.
Brian.
I don't think you could achieve 100V / 100W from a single transistor oscillator.
It's reactive power only, and it would be usually compensated. However, the design of the impedance matching isTo drive 100V across a 2.2nF capacitive load at 10MHz requires nearly 1.4KW of power
betwixt said:It might help if you told us what the application is.
To drive 100V across a 2.2nF capacitive load at 10MHz requires nearly 1.4KW of power and I don't know of any rechargeable cells that can cope with that kind of load for long.
I'm puzzled at why such a high frequency and power are needed for a piezo transducer, what exactly is it doing?
Brian.
betwixt said:It makes more sense now.
It the same principle used to eject tiny ink drops from a printer cartridge but on a much bigger scale.
As FvM says, generating the power (WITH an amplifier) isn't difficult but matching it to the piezo transducer, especially over such a wide frequency range would be a nightmare. I'm no expert in these devices but I assume they have a natural resonant frequency due to their construction.
In view of the resonant effects, I would downgrade your requirement to 'dirty' RF as the matching and piezo device will tend to clean the signal. That makes design a lot simpler as you can change from class A/AB amplification to something more efficient and electrically simpler to build.
A question for you: Bear in mind I'm no expert in this field, given the density and viscosity of water restrict it's natural flow rate, why is such a high frequency needed? I would have thought it more efficient to use a much lower frequency, not more than a few KHz to do the job.
Brian.
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