Interface linking synchronous sense and drive matrices of teleph

Details Interface linking synchronous sense and drive matrices of teleph Interface linking synchronous sense and drive matrices of teleph

1978-03-14

1980-09-02

Brown, Thomas W.

179 18ES, 179 18FG, H04Q 356

Patent

active

042208246

ABSTRACT:
Sensors SE and drivers AT electrically linked to various points of communication equipment, e.g. in a telephone system, are periodically explored by an interface linking them with a processor, under the control of a time base successively reading out their addresses during synchronous phases of respective time slots of a recurrent frame also having other phases set aside for the asynchronous exchange of data with the processor. The interface comprises a first and a second read/write memory ME.sub.1, ME.sub.2 respectively storing information relating to the evaluation of incoming signals from the sensors and to the sending of outgoing signals to the drivers, the contents of these memories being updated from time to time during asynchronous phases allocated to communication with the processor. The evaluation of incoming signals is performed in a first logic network IN, with the aid of integrating circuitry including a read-only memory ROM.sub.1 inserted in a feedback loop of the incoming-signal memory ME.sub.1 ; the forwarding of change-of-state signals from this logic network IN to the processor may be inhibited in selected instances by masking criteria stored in the incoming-signal memory ME.sub.1 which can be modified, on instructions received from the processor, with the aid of a second logic network LM including another read-only memory ROM.sub.3 also inserted in a feedback loop of memory ME.sub.1.

REFERENCES:
patent: 3576399 (1971-04-01), Schweitzer et al.
patent: 3806887 (1974-04-01), Schulte et al.
patent: 3909542 (1975-09-01), Wunluck et al.
patent: 4041465 (1977-08-01), Conerly

Affiliated with

Also associated with

Rating

Interface linking synchronous sense and drive matrices of teleph does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Interface linking synchronous sense and drive matrices of teleph, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interface linking synchronous sense and drive matrices of teleph will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1710020