Switching-type DC power source apparatus

Patent 6011707 Issued on January 4, 2000. Estimated Expiration Date:

December 1, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventor

Mine, Ryuta

Assignee

Canon Kabushiki Kaisha

Application

No. 203514 filed on 12/01/1998

US Classes:

363/89, With transistor control means in the line circuit363/60Including semiconductor means

Examiners

Primary: Berhane, Adolf

Attorney, Agent or Firm

Fitzpatrick, Cella, Harper & Scinto

International Class

H02M 007/155

Foreign Application Priority Data

1997-12-05 JP

Abstract

In a switching-type DC power source apparatus which uses a booster-chopper type active filter circuit as its rectifier circuit, even at zero-crossing timing of an AC voltage to be input in the rectifier circuit, a current supply source for making a current as if it is flowing is added to a current detection circuit for detecting the current flowing in the active filter circuit, thereby preventing a prickle-like input current including a number of harmonic components from flowing in the apparatus.