Title:
ELECTRONIC DEVICE AND POWERUP METHOD
Document Type and Number:
WIPO Patent Application WO2003015279
Kind Code:
A3
Abstract:
An electronic device (100) having n circuit portions (120a, 120b, ...,120n) each connected to a supply rail (102) through respective coupling elements (110a, 110b, ..., 110n) is arranged for gradual self-timed powerup/powerdown of the n circuit portions (120a, 120b, ...,120n) under control of control circuit (240a, ..., 240n-1) to prevent the occurrence of power surges during the powerup of the device (100). When the first circuit portion (120a) has sufficiently been powered up through supply rail (102) and the first coupling element (110a), control circuit (240a) switches second coupling element (110b) to a conductive state, thereby enabling the powerup of second circuit portion (120b). In a similar fashion, the electronic device (100) can be powered down in a gradual self-timed manner through coupling elements (112a, 112b, ...,112n), which respectively connect circuit portions (120a, 120b, ..., 120n) to a further supply rail (104).
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Inventors:
VEENDRICK HENDRICUS J M
ZIJLSTRA ROBERT W J
ZIJLSTRA ROBERT W J
Application Number:
PCT/IB2002/002835
Publication Date:
October 27, 2005
Filing Date:
July 04, 2002
Export Citation:
Assignee:
KONINKL PHILIPS ELECTRONICS NV (NL)
International Classes:
H03K17/28; H03K17/08; H03K17/16; H03K17/22; H03K17/284; H03K17/693; (IPC1-7): H03K17/22
Foreign References:
| US4614880A | 1986-09-30 | |||
| US6333650B1 | 2001-12-25 | |||
| US5763960A | 1998-06-09 | |||
| US5781490A | 1998-07-14 | |||
| US4951171A | 1990-08-21 | |||
| US5587684A | 1996-12-24 |
Other References:
"SYSTEM FOR CONTROLLING MULTIPLE POWER SUPPLIES WITH ONE CONTROLLER", IBM TECHNICAL DISCLOSURE BULLETIN, IBM CORP. NEW YORK, US, vol. 40, no. 6, 1 June 1997 (1997-06-01), pages 57, XP000728335, ISSN: 0018-8689
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 12 29 October 1999 (1999-10-29)
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 12 29 October 1999 (1999-10-29)
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