H - Electricity – 04 – M
Patent
H - Electricity
04
M
H04M 19/00 (2006.01) H03K 17/687 (2006.01) H03K 17/693 (2006.01) H04B 1/40 (2006.01) H04B 1/44 (2006.01) H04M 1/00 (2006.01) H04M 1/73 (2006.01)
Patent
CA 2073397
In order to reduce volume and weight of a power supply of a compact portable telephone set and thus reduce the volume and weight of the compact portable telephone set itself, a P-channel power MOSFET is used as a power switching element, and a negative voltage, for example -11 volts, is applied across a source and a gate from a DC/DC converter to turn on the P-channel power MOSFET so that power is supplied from a battery which serves as one power supply. When the gate and the source of the power MOSFET are maintained at the same potential, the power MOSFET is turned off and power is supplied from another power supply.
Afin de réduire le volume et le poids du bloc d'alimentation d'un téléphone portatif compact et de réduire ainsi le volume et le poids de ce téléphone même, un MOSFET d'alimentation à canal p est utilisé comme élément de commutation d'alimentation et une tension négative, par exemple une tension de -11 volts, est appliquée entre la source et l'électrode de commande d'un convertisseur continu-continu pour rendre le MOSFET d'alimentation à canal p conducteur afin que la pile d'alimentation puisse transmettre le courant d'alimentation. Quand l'électrode de commande et la source du MOSFET d'alimentation sont maintenues au même potentiel, le MOSFET est bloqué et le courant est fourni par un autre bloc d'alimentation.
Nakamura Asako
Sekiguchi Akihiko
Tsunehiro Naoshi
Marks & Clerk
Matsushita Electric Industrial Co. Ltd.
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