Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1997-09-22
1998-07-28
Sheikh, Ayaz R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324525, G06F 1300
Patent
active
057872600
ABSTRACT:
A delay gate is provided within a control unit to delay the reset signal by a predetermined period of time to monitor the time at which the reset signal passes through the busline. If the busline length exceeds a prescribed length, then an LED is turned on. Or a resistance proportional to the length of a duplex bus signal line is connected to each connecting portion, a reference resistance is provided internally of the control unit and one of the duplex signal buslines of the connecting portion is grounded while the other is connected through the reference resistance to a reference power supply to compare the potential difference between the reference resistance and the connecting point of the duplex signal busline with a reference signal so that, when the busline length exceeds a prescribed value, the LED is turned on.
As a result, when the user daisy-chains the components freely, it becomes possible to inform whether the entire line length has exceeded or not, and therefore, unstable operation of the system leading to the occurrence of troubles can be prevented. Further, even if the connecting portions or the terminal resistance module is disconnected, it can be informed to the user.
REFERENCES:
patent: 3911358 (1975-10-01), Shalyt et al.
patent: 4023154 (1977-05-01), Comeaux
patent: 4148011 (1979-04-01), McLagan et al.
patent: 5057783 (1991-10-01), Gubisch
patent: 5095444 (1992-03-01), Motles
patent: 5119496 (1992-06-01), Nishikawa et al.
patent: 5140680 (1992-08-01), Best
patent: 5142526 (1992-08-01), Moriue et al.
patent: 5162743 (1992-11-01), Kruchowski et al.
patent: 5179341 (1993-01-01), Whiteside
patent: 5261060 (1993-11-01), Free
patent: 5321632 (1994-06-01), Otsuji et al.
patent: 5459440 (1995-10-01), Claridge et al.
patent: 5473264 (1995-12-01), Mader et al.
Chung-Trans Xuonk
NEC Corporation
Sheikh Ayaz R.
LandOfFree
Busline length recognition system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Busline length recognition system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Busline length recognition system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-31259