Boots – shoes – and leggings
Patent
1989-11-28
1991-10-01
Anderson, Lawrence E.
Boots, shoes, and leggings
3642803, 3642701, 3642283, G06F 1516
Patent
active
050539434
ABSTRACT:
In a system having plural CPUs, at least one of which is continuously operating and at least another of which is intermittently operating, autonomous counters monitor counter reset signal indicating normal operation of respective CPUs, each counter producing a CPU reset signal when it fails to receive a counter reset signal within a predetermined time period. To prevent erroneous indication of a malfunction and thus erroneous resetting of the CPUs when the intermittently operating CPU does not produce a counter reset signal within the predetermined time period while it is in its normal, non-operating state, a control circuit is provided to supply the autonomous counter monitoring the intermittently operating CPU with the counter reset signals produced by a continuously operating CPU while the intermittently operating CPU is in its non-operating state. The control circuit is advantageously used in portable mobile telephone sets and portable transmitter-receiver sets controlled by CPUs some of which are intermittently operated to save battery power.
REFERENCES:
patent: 3838261 (1974-09-01), Rice et al.
patent: 4210226 (1980-07-01), Ichioka
patent: 4580243 (1986-04-01), Renner
Anderson Lawrence E.
NEC Corporation
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