Apparatus for calculating amplitude values
US4073008A · kind A · utility
4Cited by
5References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Aug 26, 1976 |
| Grant date | Feb 7, 1978 |
| Priority date | — |
| Expiry date | Aug 26, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The amplitude value of a sinusoidal wave is calculated by operating means which processes absolute values of two data samples which are sampled from the sinusoidal wave at two points spaced 90.degree. electrical degrees apart thereby producing an electrical signal proportional to the amplitude value. The operation means comprises a comparator, a combination of an adder and a subtractor, or a combination of a comparator and an adder. The output of the comparator or the combination is multiplied with a predetermined coefficient and then added together to produce said signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.