Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1979-09-18
1981-02-17
Trafton, David L.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
324121R, 340799, 340739, 364900, G08B 536
Patent
active
042518156
ABSTRACT:
A signal-envelope display system for a digital oscilloscope includes a memory for storing minimum and maximum signal values in adjacent storage locations, an address counter for sequentially addressing the memory, and a control circuit for selecting the least significant bit of the address count signal arriving at the memory from the least significant bit of the address count signal, a fixed logical low, or a fixed logical high to there by select every address location of the memory, or only the even locations, or only the odd locations over a given count cycle. The values retrieved from memory are converted to analog values and a vector generator connects the analog values to provide connected minimum and maximum values, connected maximum values, and connected minimum values for display. A signal-envelope display is provided by superposing the three displays.
REFERENCES:
patent: 3872461 (1975-03-01), Jarosik et al.
patent: 3965419 (1976-06-01), Paiva
patent: 3968499 (1976-07-01), Lowe et al.
patent: 4086579 (1978-04-01), Easter
Noe George T.
Tektronix Inc.
Trafton David L.
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