Re: generating stable IIR filter?

Jerry Avins wrote:

(snip)

You're right; I wasn't thinking straight. Each transformer is a single L/r time constant, the L being the shunt inductance. In fact, connecting two transformers back to back merely parallels the Ls, halving it and raising the cutoff an octave. (The R, of course, is the source impedance. I'm ignoring the leakage inductance and shunt capacitance.)

So the rolloff to DC is 20 dB/decade; not a hard response to produce. The high-frequency rolloff is probably not intended to be part of the model. Thanks for picking up on my slip. I should do a bit more math.

I haven't thought about this one for a while now.

Isn't there also a term related to the core saturating?

That is, what limits the low frequency response for power
transformers? I always thought it was from core saturation.

I missed the beginning of this discussion, though.

-- glen

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