Signal disconnection monitor apparatus and signal period detection apparatus therefor
US5568529A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 1995 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | Jul 28, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C3/04
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A signal disconnection detection apparatus includes a first counter, a first comparator, and a detector. The first counter is reset by a pulse signal received every predetermined period of a clock signal, and counts a clock signal transmitted together with data. The first comparator compares a count value of the first counter with a set value larger than the number of clock signals included in one period of the pulse signal, and stops an operation of the first counter when the count value of the first counter exceeds the set value. The detector detects that the count value of the first counter does not continuously change within a predetermined period of time to output a signal disconnection detection signal of at least one of the clock signal and the pulse signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.