Another application not yet mentioned: Isolation Amplifiers, esp. from Burr Brown.
They use a modulator to transform the input audio signal to RF, then feed that through a pair of capacitors to a demodulator on the "other side". This is a low-power application.
As mentioned by others in this thread, high power applications are impractical because the energy density of electric fields is much lower than that of magnetic fields.
I was just reading about a 'capacitative transformer' for matching impedance, used for resonant circuits. The idea is to make the source see the parallel capacitance of two caps, and make the load see the series capacitance.
However, I didn't think that was what the OP was interested in, so I didn't post about it. LOAD AC source --- [50R] ---+--- [47.3pF]---+--- [2000R]---- GND | | [250.6pF] [63.6nH] | | GND GND
This is from "RF Circuit Design" By Chris Bowick. He calls it a Tapped-C network.
-- Regards, Bob Monsen
Hello,
If this is ment for transforming
230V 50 Hz to a lower voltage e.g. 12V just put a capacitor in series. A too big value will blow up everything secundary and a too small will deliver not enough power.I used 6uF (630V) bipolar in series with a 60Watt lightbulb to make the amount of light reducable.
Caution with this due to live voltage hazard.
Jamie Morken wrote:
You can get a voltage gain of a few percent with a properly connected RC network as shown in this old patent. The phase is frequency dependent however. Ratch
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