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US 4,736,152 AGranted
Load current interference reducing apparatus
AssigneeU.S. Philips Corporation
InventorsManfred Albach, Armin F. Wegener, Hubert C. Raets
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AssigneeU.S. Philips Corporation
InventorsManfred Albach, Armin F. Wegener, Hubert C. Raets
Estimating the term…
A circuit arrangement for reducing an interference current produced by a load (2). The frequency of the interference current is considerably higher than the frequency of a supply voltage source (1) which is coupled to the load. In order to reduce the interference current, a compensation circuit is provided comprising at least one connection branch connected in the leads between the load and the supply voltage source and having each time a series-combination of a capacitor and a controlled signal source. Each signal source supplies a current dependent upon a control signal. The control signals are derived from the current flowing in a lead to the connection branch or away from it. The magnitude and the phase of the currents supplied by the signal sources are proportioned so that the interference current flows for the major part through the connection branch.
A circuit arrangement comprising a load coupled via leads to a supply voltage source wherein the load produces in the current of the supply voltage source an interference current whose frequency is considerably higher than that of the current of the supply voltage source, a compensation circuit for reducing the interference current and which comprises at least one connection branch with a capacitor connected between said leads, characterized in that the connection branch includes a series arrangement of the capacitor and a controlled signal source wherein the signal source supplies a current dependent upon a control signal;
Dependencies are inferred from the claim text.