Title:
POWER SOURCE CONTROL CIRCUIT
Document Type and Number:
Japanese Patent JP3903236
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To realize to miniaturization and to enable an optical control for dealing with a load to be performed, regarding the power source control circuit to suppress fluctuation of stabilized voltage from a power source unit when the load is connected.
SOLUTION: This power source control circuit is constituted for supplying the stabilized voltage VCC from the power source unit to loads 7-1 to 7-n such as cards 2-1 to 2-n via variable impedance elements such as FETs 6-1 to 6-n, and it is provided with a control part 3 that starts counting operation based on a mounting information INS1 to INSn when the loads 7-1 to 7-n are connected by mounting the cards, etc., by a counter and that controls impedance of variable impedance elements corresponding to a counted value of the counter. Furthermore, speed of impedance control of the variable impedance elements is selected corresponding to a type information CardID1 to CardIDn to indicate the type, etc., of the loads 7-1 to 7-n.
Inventors:
Hironobu Sumida
Hamaguchi Masanori
Kutsu
Hideki Shiono
Hiraike Shogo
Katsuaki Yamanaka
Solder definition
Hamaguchi Masanori
Kutsu
Hideki Shiono
Hiraike Shogo
Katsuaki Yamanaka
Solder definition
Application Number:
JP18479899A
Publication Date:
April 11, 2007
Filing Date:
June 30, 1999
Export Citation:
Assignee:
富士通株式会社
International Classes:
G05F1/00; G06F3/00; G05F1/10; (IPC1-7): G05F1/00; G05F1/10; G06F3/00
Domestic Patent References:
| JP5049168A | ||||
| JP7142985A |
Attorney, Agent or Firm:
Manabe Kiyoshi
Shoji Kashiwaya
Koichi Watanabe
Shoji Kashiwaya
Koichi Watanabe