Title:
回路遮断器
Document Type and Number:
Japanese Patent JP5243344
Kind Code:
B2
Abstract:
A circuit breaker includes an external oscillation circuit (14) which generates a high speed external clock for operating a microcomputer (8) at a high speed, a timing circuit (15) which sets a timing corresponding to an oscillation stable time from start-up of the external oscillation circuit (14) up to a time when the oscillation of the external oscillation circuit (14) gets stable, and an operation clock selecting circuit (13) which selectively supplies a low speed internal clock from the internal oscillation circuit (12) as an operation clock of the microcomputer at start-up of the microcomputer and a high speed external clock from the external oscillation circuit (14) as the operation clock of the microcomputer after elapse of the timing set by the timing circuit (15).
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Inventors:
Toshimitsu Nomura
Tatsuyuki Tsukamoto
Tatsuyuki Tsukamoto
Application Number:
JP2009122070A
Publication Date:
July 24, 2013
Filing Date:
May 20, 2009
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H01H83/02
Domestic Patent References:
| JP10126952A | ||||
| JP3223913A | ||||
| JP61123916A | ||||
| JP4251312A | ||||
| JP2002524012A | ||||
| JP2000113796A |
Attorney, Agent or Firm:
Masuo Oiwa
Toshihide Kodama
Takenaka Ikuo
Keigo Murakami
Toshihide Kodama
Takenaka Ikuo
Keigo Murakami