Title:
POWER SUPPLY SWITCH CIRCUIT
Document Type and Number:
Japanese Patent JP3215150
Kind Code:
B2
Abstract:
PURPOSE: To surely turn on a sub switch when a main switch is turned on.
CONSTITUTION: When a main switch 2 is turned on last time, charges stored in a capacitor 14 are passed through a detecting switch 11, moved to a capacitor 15 and held as detecting signals Sk in the case of instantaneously turning on the detecting switch 11 while being interlocked to the turn-on of the main switch 2 this time. Thus, a first power supply circuit 3 is activated later even when the detecting switch 11 is turned on before the first power supply circuit 3 is activated. A microcomputer 9 is activated by an outputted driving voltage Ss, and the detecting signals Sk stored in the capacitor 15 are led to the microcomputer 9. The microcomputer 9 turns a control signal Sd to a high level and turns on a transistor 7 and thus, a sub switch 4 is turned on.
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| JP3628031 | POWER SOURCE CIRCUIT |
Inventors:
Katsuto Suizu
Application Number:
JP6863992A
Publication Date:
October 02, 2001
Filing Date:
March 26, 1992
Export Citation:
Assignee:
Toshiba Corporation
Toshiba A.V.E. Co., Ltd.
Toshiba A.V.E. Co., Ltd.
International Classes:
H04N5/63; (IPC1-7): H04N5/63
Domestic Patent References:
| JP53117929A | ||||
| JP5513558A | ||||
| JP442666A | ||||
| JP572775U |
Attorney, Agent or Firm:
Susumu Ito
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