Frequency counter
US4616173A · kind A · utility
24Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1984 |
| Grant date | Oct 7, 1986 |
| Priority date | — |
| Expiry date | Mar 21, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R23/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A frequency counter employs a temperature sensitive oscillator mounted in proximity to a master crystal oscillator to provide an output frequency which varies appreciably with changes in ambient temperature and the frequency of the temperature sensitive oscillator is periodically counted and compared to a table of correction factors stored in memory to select a correction factor which is applied to the counted frequency of an input signal to provide a temperature corrected frequency count.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.