Communication system using low bandwidth wires
US8594133B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2008 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | Jun 12, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0083
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A high frequency signal is down-converted into an intermediate frequency signal, transmitted over a limited bandwidth medium from a master unit to a remote unit and up-converted back into its original high frequency at the remote unit. The up-conversion is aided by reconstruction of a reference signal embedded at the master unit as a carrier for a management signal which is transmitted to the remote unit through the same limited bandwidth medium together with the intermediate frequency signal. The reference signal is reconstructed using a phase locked loop which includes a charge pump and is kept stable during intervals between bits and messages by a charge pump shutter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.