Method and apparatus for phase detection having a narrow dead band and a linear output
US4282482A · kind A · utility
1Cited by
5References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 18, 1979 |
| Grant date | Aug 4, 1981 |
| Priority date | — |
| Expiry date | Jun 18, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R25/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Two input signals of uncertain phase relationship are applied to trigger circuits which develop sharply defined logic level transitions in response to the input signals crossing predetermined amplitude threshold levels. These logic level transitions are then used to clock a register whose outputs are gated and filtered to provide a DC output signal whose level indicates the phase difference between the two input signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.