Method and apparatus for evaluating jitter
US4876655A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1985 |
| Grant date | Oct 24, 1989 |
| Priority date | — |
| Expiry date | Dec 2, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R13/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The distribution with respect to time of an event defined by the waveform of a repetitive input signal having a magnitude that lies within a predetermined range of values is observed by generating a sample signal at least once during each repetition of the input signal, generating an n-bit digital timing signal representative of the time of occurrence of a sample signal relative to the time of occurrence of the trigger signal, and sampling the repetitive input signal and generating a memory enable signal in the event that the magnitude of the input signal at the time of sampling falls within the predetermined range of values. The memory locations of a memory having 2.sup.n separately addressable memory locations are allocated respectively to the 2.sup.n possible values of the timing signal, and the contents of a memory location of the memory means are incremented by one unit in the event that a memory enable signal is generated in response to a sample signal that is associated with the timing signal to which the location is allocated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.