Waveform storage system
AssigneeTektronix, Inc.
InventorsThomas P. Dagostino, Luis J. Navarro
Life of this patent
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Abstract
A waveform storage system is provided in which waveform envelopes or maximum signal deviations along a waveform are detected and stored. A sampling clock operates at a predetermined fixed rate independently of a recording clock which is operable at rates determined by the sweep speed and is equal to or slower than the sampling clock. Data from an analog-to-digital converter is simultaneously applied to at least one latch and at least one comparator to be compared with the latch output. If the absolute value of the signal is greater than that stored in the latch, the latch is updated with the new value. The contents of the latch are clocked into memory by the recording clock.
Claims10
A waveform storage system, comprising:
- a waveform memory;
- means for converting an analog signal to successive digital data representative of instantaneous signal values at a predetermined first rate;
- means for receiving said successive digital data from said conversion means and detecting therefrom digital data representative of maximum signal deviation values occuring over an interval determined by a second rate;
- and
- means for storing said detected digital data in said waveform memory at said second rate,
- wherein said first rate is greater than or equal to said second rate.
A waveform storage system, comprising:
- a sampling clock for producing first clock pulses at a predetermined first rate;
- an analog-to-digital converter for converting an analog signal to successive digital data at said first rate;
- a waveform memory;
- a recording clock for producing second clock pulses at a second rate which is equal to or slower than said first rate;
- means for detecting maximum and minimum signal values which occur during each recording clock interval;
- and
- means responsive to said second clock pulses for transferring said detected maximum and minimum signal values to said waveform memory.
Dependencies are inferred from the claim text.