EP 1111492 A1 20010627 - Low loss voltage preregulator
Title (en)
Low loss voltage preregulator
Title (de)
Verlustarmer vorgeschalteter Spannungsregler
Title (fr)
Prérégulateur de tension à faibles pertes
Publication
Application
Priority
US 45061799 A 19991130
Abstract (en)
A preregulator circuit is connected between the battery supply of a cellular phone and the input of an integrated circuit regulator to maintain the input of the integrated circuit at a voltage consistent with its rated voltage. To avoid the voltage drop in the preregulator when the battery is low, a shut off circuit is actuated to short circuit or minimize the voltage drop of the preregulator. <IMAGE>
IPC 1-7
IPC 8 full level
H02J 7/00 (2006.01); G05F 1/10 (2006.01); G05F 1/56 (2006.01); G05F 1/575 (2006.01); H02J 1/00 (2006.01)
CPC (source: EP)
G05F 1/575 (2013.01)
Citation (search report)
- [XA] US 5629609 A 19970513 - NGUYEN BAOSON [US], et al
- [A] US 5982158 A 19991109 - SCHNARS MICHAEL JOHN [US], et al
- [A] US 4536699 A 19850820 - BAKER RICHARD H [US]
- [A] US 4543522 A 19850924 - MOREAU JEAN M [FR]
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 00309544 A 20001030; JP 2000365065 A 20001130