Signal recognition system

Details Signal recognition system Signal recognition system

1987-09-21

1989-08-22

Lall, Parshotam S.

Boots, shoes, and leggings

364486, 3701101, 377 20, 379286, 3281291, 307234, G01R 2902, H04J 312, H03K 522

Patent

active

048602302

ABSTRACT:
A signal persistence time interval recognition system reproduces a condition of an input signal as a condition of an output signal only when the input signal condition persists for at least a predetermined time interval. The system periodically scans the input signal condition and has a first memory (ROM) for storing a start value indicative of the time interval. A second memory (RAM) stores a value indicative of the time counted since the detection of a difference between the input and output signal conditions. A third memory stores the output signal condition and a processor brings the start value from the first memory into the second memory when no difference is detected. The processor modifies the value in the second memory each time such a difference is detected and until a value is reached indicating that the time interval has been counted, the output signal condition in the third memory being then changed. The first memory only stores a single start value for all conditions of the input signal and the processor perform the modification in the second memory independently of the first memory.

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