G - Physics – 01 – R
Patent
G - Physics
01
R
375/33, 324/70
G01R 13/22 (2006.01) G01R 31/3177 (2006.01) G06F 11/25 (2006.01)
Patent
CA 1211508
- 41 - DIGITAL SIGNAL SAMPLING SYSTEM WITH TWO UNRELATED SAMPLING TIMEBASES Abstract A digital signal sampling system is disclosed for reconstructing the the relationship of digital data signals sampled by two sampling clock signals with different unrelated timebases, The digital data signals sampled may be the same data signal or two different data signals sampled simultaneously in two separate sampler circuits at two different unrelated sampling clock freguencies or timebases to produce first and second sampled data signals. A timebase correlation circuit produces first and second time correlation signals in the form of binary level signals in response to the receipt by a last clock pulse detector of first and second store clock signals which are derived from first and second sampling clock signals. The time correlation signals indicate by their binary level the source of the last previous clock pulse of the first and second store clock signals which was received by the timebase correlation circuit. The timebase correlation signals and the first and second sampled data signals are stored in two acquisition memories connected to such sampler circuits, and are read out of the memories and together with a last clock pulse output of the correlation circuit are applied to a data signal reconstruction means including a digital computer which is programmed to reconstruct the digital data signals in time relationship and to display the reconstructed data signals on a cathode ray tube or other display device.
448577
Blattner John D.
Boyce Douglas G.
Denbeste Steven C.
Hillen Kenneth K.
Kirby Eades Gale Baker
Tektronix Inc.
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