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EP0507393A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Circuit arrangement

Assignee: Koninklijke Philips NV
•
Filing: 1992-03-30
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Granted: —
•
Expires: 2012-03-30
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Abstract

Abstract The invention relates to a circuit arrangement which is provided with an up-converter (3) which comprises at least inductive means (31) and switching means (32), and with capacitive means (34) which in the operational state are periodically charged with a charging current in dependence on periodic switching of the switching means. The switching means are switched to the conducting state periodically during a substantially constant time t on . According to the invention, the circuit arrangement is provided with detection means (I) for direct detection of the charging current. As a result, a load current which has a sinusoidal shape by good approximation is drawn from a connected AC voltage supply source by the circuit arrangement.

Inventors

  • 👤 Franciscus Hubertus Theodorus Lammers

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-02 13:59
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M1/00; H02M1/42; H02M1/4208; H02M1/4225; H05; H05B; H05B41/00; H05B41/14; H05B41/26; H05B41/28; Y; Y02; Y02B; Y02B70/00; Y02B70/10

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 87 words
A circuit arrangement provided with an up-converter which comprises at least inductive means and switching means, and with capacitive means which in the operational state of the circuit arrangement are periodically charged with a charging current in dependence on periodic switching of the switching means by means of a drive circuit, the switching means being switched to the conducting state periodically for a substantially constant time t on , characterized in that the circuit arrangement is provided with detection means for direct detection of the charging current.
Claim 2
Dependent Claim 19 words
A circuit arrangement as claimed in Claim 1, characterized in that the detection means are formed by rectifier means.
Claim 3
Dependent Claim 34 words
A circuit arrangement as claimed in Claim 1 or 2, characterized in that the circuit arrangement is also provided with a current limitation for the switching means which are connected to the detection means.

References Cited (Backward Citations)

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