Signal controlled waveform recorder

Details Signal controlled waveform recorder Signal controlled waveform recorder

1984-11-30

1986-12-23

Hoffman, James R.

Boots, shoes, and leggings

G06F 305, G06F 306

Patent

active

046316973

ABSTRACT:
A multi-channel electronic waveform recorder, for storing waveform data and time of occurrence information, i.e., a "time-tag", for each stored value of an input waveform, is disclosed. Specifically, each channel of the waveform recorder compares a previously stored value of a corresponding input signal to a current value, and stores the current value whenever the difference between the input signal and the previously stored value is a predetermined amount.

REFERENCES:
patent: 3225333 (1965-12-01), Vinal
patent: 3344406 (1967-09-01), Vinal
patent: 3629855 (1971-12-01), Conley
patent: 4110564 (1978-08-01), Andresen
patent: 4110684 (1978-08-01), Gale
patent: 4271486 (1981-06-01), Dagostino et al.
patent: 4311960 (1982-01-01), Barr
Dedinas, "Advanced Waveform Recorders Do More than Capture Transients", EDN, Sep. 5, 1978, pp. 103-110.
Kemp, Portable Minicomputer/Modem System for Collecting Field Data", 1977 Power Industry Computer Applications Conference, pp. 403-406.
Kajihara, "Power Transient Monitor", IEEE Transactions on Instrumentation and Control, Feb. 1972, pp. 74-77.
Anderholm, "Time-Tag Generator for Variable Sampling Rate Analog-to-Digital Converter", IBM Technical Disclosure Bulletin, vol. 8, No. 11, Apr. 1966, pp. 1520-1521.

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