Active electromagnetic interference filter circuit for suppressing a line conducted interference signal
A technology of electromagnetic interference filtering and filtering, which is applied in the direction of electrical components, impedance converters, impedance networks, etc., and can solve the problems of complex and expensive implementation of active filters
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[0029] Components with the same reference signs in different drawings indicate elements with the same function. Each inductor used throughout this document includes a coil, transformer, or any circuit that represents the value of inductance. In the following figures, if present, the power supply voltage Vsup is arranged on the right-hand side of the circuit, and the load L is arranged on the left-hand side.
[0030] Fig. 1A shows a schematic circuit diagram of an active EMI filter circuit Fa according to the present invention. The active EMI filter circuit Fa having a filter input terminal Ti and a filter output terminal To further includes a filter inductor Lo and an active circuit Ca. The filter inductor Lo is arranged between the filter input terminal Ti and the filter output terminal To. The active circuit Ca includes a circuit input terminal Pi and a circuit output terminal Po, through which the active circuit is arranged in parallel with the filter inductance Lo, and is also ...
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