| 摘要 |
The invention relates to a control means and method for a transistor switch circuit controlling a power supply circuit for providing electric power to a load, comprising: a power supply stage having an LC circuit with an inductor, and a control stage having an estimation of the inductor current as a feedback signal. According to the invention, the current through the inductor is measured by means of a measuring winding (17) and an integrator having the function of an RC network. The current measuring circuit is very stable and absolutely free from any source of offset signals. Also, it has no frequency limitations.
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