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Patent Searching and Data


Title:
MONITORING DEVICE AND ON-VEHICLE TYPE ELECTRONIC CONTROLLER
Document Type and Number:
Japanese Patent JP2013200714
Kind Code:
A
Abstract:

To secure higher failsafe performance, in a configuration of monitoring an operation of a controller such as a microcomputer using charging and discharging of a capacitor.

A charging/discharging control circuit 110 supplies a first current I1 through a first route, charges a capacitor 202, and discharges the capacitor 202 according to watchdog signals cyclically inputted from a controller 201. When a charging voltage of the capacitor 202 reaches a prescribed value, a signal output circuit 130 outputs signals indicating absence of the watchdog signals. When detecting supply stop of the first current I1 from the charging/discharging control circuit 110, a forced charging circuit 140 supplies a second current I2 larger than the first current I1 through a second route different from the first route, and charges the capacitor 202.


Inventors:
KUME MASAYOSHI
KIDO KEISUKE
KOMATSU KAZUHIRO
Application Number:
JP2012068704A
Publication Date:
October 03, 2013
Filing Date:
March 26, 2012
Export Citation:
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Assignee:
FUJITSU TEN LTD
International Classes:
G06F11/30
Domestic Patent References:
JPH05173841A1993-07-13
JPH07230395A1995-08-29
JPH1196044A1999-04-09
JPH05173841A1993-07-13
JPH07230395A1995-08-29
JPH1196044A1999-04-09
Attorney, Agent or Firm:
特許業務法人 信栄特許事務所