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Altera_Forum's avatar
Altera_Forum
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17 years ago

Stratix II: Coil circuit

I am trying to create a very close range wireless communication using stratix II fpga. I want to achieve that using coil - coil communication. So I connected coil1 to fpga1 with a series resi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

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It's not easy to measure because of the complex impedance. RF instruments, e.g. a network analyser would be required for an exact measurement. Supplementing the primary coil with a capacitor to a resonant circuit should ease a rough estimation from voltages at the primary.

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Ok I got what you said.

One more question.

Since the rate of change in current in the primary coil will produce voltage at the second coil, I think its clear that we need to use a resistance with low value in series with the coil. Isnt that true?

At the secondary coil, parallel resistor with high value should be used to maximize the voltage at the fpga input. Right?