Process for reducing the electrical consumption of a transmitter/receiver of digital information, in particular a cellular mobile telephone, and corresponding transmitter/receiver
US6876874B2 · kind B2 · utility
9Cited by
4References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2001 |
| Grant date | Apr 5, 2005 |
| Priority date | — |
| Expiry date | Mar 2, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The electrical consumption of a cellular mobile telephone is reduced by using fractional-division phase-locked loops receiving a frequency reference from a fairly inaccurate quartz oscillator. Electrical consumption is also reduced by switching the output of the oscillator onto the input of the processing stage when the transmission/reception stage is inactive. The fractional-division phase-locked loops can then be deactivated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.