Data recorder including a recirculating non-volatile memory

Details Data recorder including a recirculating non-volatile memory Data recorder including a recirculating non-volatile memory

1989-02-02

1991-10-08

Fears, Terrell W.

Boots, shoes, and leggings

360 5, 360 22, 369 20, G11C 1100

Patent

active

050560565

ABSTRACT:
A light weight data recorder employs a non-volatile electronic memory to store several channels of data occurring before and after a triggering event. Data may be retained in the memory with the aid of a NiCad battery. Upon the occurrence of a triggering event, which may be user defined, the input of new data into the memory will be terminated after a selectable predetermined time has passed. This allows data to be recorded both before and after a specified event. The triggering event may be derived by sensing a change in the signal level of one of the data inputs by a predetermined amount, or it may be a specially generated signal. Once a triggering event has occurred, the data retained in memory is protected. Circuit means are provided to retrieve the stored data without destroying it. Another circuit permits recording of new data in the memory only after a unique signal has been detected.

REFERENCES:
patent: 4409670 (1983-10-01), Herndon et al.
patent: 4646241 (1987-02-01), Ratchford et al.

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