Global Patent Index - EP 0925635 A4

EP 0925635 A4 2000-01-12 - A PROGRESSIVE START-UP CHARGE PUMP AND METHOD THEREFOR

Title (en)

A PROGRESSIVE START-UP CHARGE PUMP AND METHOD THEREFOR

Title (de)

LADUNGSPUMPE MIT PROGRESSIVEM ANLAUF UND VERFAHREN DAFÜR

Title (fr)

POMPE DE CHARGE A DEMARRAGE PROGRESSIF ET PROCEDE CORRESPONDANT

Publication

EP 0925635 A4 (EN)

Application

EP 97949816 A

Priority

  • US 9723066 W
  • US 89134397 A

Abstract (en)

[origin: WO9903192A1] A progressive start-up charge pump (10) that eliminates the start-up problems of p-channel charge pump stages (12) by starting the charge pump (10) one stage (12) at a time. The charge pump (10) has a plurality of charge pump stages (12) wherein each of the plurality of charge pump stages (12) are coupled to a successive charge pump stage (12) in a cascade mode. An enabling circuit (14) is coupled to each of the plurality of charge pump stages (12) for individually starting each of the plurality of charge pump stages (12) one charge pump stage (12) at a time starting with a last charge pump stage (12) and successively turning on a directly previous charge pump stage (12) until the first charge pump stage (12) is started. This will ensure that the voltage output node (12B) is at a greater potential than the voltage input node (12A) for each of the plurality of charge pump stages (12) during start-up.

IPC 1-7 (main, further and additional classification)

H02M 3/18; G05F 3/02; H02M 3/07

IPC 8 full level (invention and additional information)

G05F 3/02 (2006.01); H02M 1/00 (2007.01); H02M 1/36 (2007.01); H02M 3/07 (2006.01)

CPC (invention and additional information)

H02M 1/36 (2013.01); H02M 3/073 (2013.01); H02M 2001/007 (2013.01)

Citation (search report)

  • No further relevant documents disclosed
  • See also references of WO 9903192A1

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

WO 9903192 A1 19990121; EP 0925635 A1 19990630; EP 0925635 A4 20000112; JP 2001500300 A 20010109; KR 20000068537 A 20001125; TW 432768 B 20010501

INPADOC legal status


2003-12-10 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030531

2000-01-12 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 19991126

2000-01-12 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

- Designated State(s): DE FR GB IT

2000-01-12 [RIC1] CLASSIFICATION (CORRECTION)

- Free text: 7H 02M 3/18 A, 7G 05F 3/02 B, 7H 02M 3/07 B

1999-06-30 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19990409

1999-06-30 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB IT