Low power radio synthesizer with harmonic identification feature
US4513448A · kind A · utility
13Cited by
5References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 12, 1983 |
| Grant date | Apr 23, 1985 |
| Priority date | — |
| Expiry date | Aug 12, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S331/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A channelized radio has a phase-lock loop which locks to any one of a pluity of carrier frequencies. These frequencies are harmonics of a reference signal. A harmonic identification circuit is disclosed which produces harmonics of a reference signal which is slightly offset from the original reference signal. The offset harmonic which is closest to the locked frequency is compared with the locked frequency and a difference measurement is produced. This difference measurement identifies the locked frequency and enables the operator to lock to a new frequency if desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.