Communication system, a communication device and a frequency synthesizer
US6085075A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 4, 1998 |
| Grant date | Jul 4, 2000 |
| Priority date | — |
| Expiry date | Dec 4, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/30
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A radio device has an antenna for receiving a radio frequency signal, and a radio frequency mixer for down-converting the received radio frequency signal to an intermediate frequency signal. The radio device further has a frequency synthesizer for generating a local oscillator signal for the radio frequency mixer. The frequency synthesizer has a first local oscillator loop for producing a band selective local oscillator signal, a second local oscillator loop for producing a channel selective local oscillator signal, and a local oscillator signal mixer for mixing the band and channel selective local oscillator signals. The band selective local oscillator signal selects a band, and the channel selective local oscillator signal selects a channel within the band. The generated local oscillator signal is an output signal of the local oscillator signal mixer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.