RF transmitter employing linear and non-linear pre-correctors
US6751266B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 2000 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Apr 18, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2201/3221
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A radio frequency (RF) transmitter system is presented having an input circuit for receiving an RF signal to be amplified and transmitted. A series circuit is provided which includes first and second cascaded amplifier networks located downstream from the input circuit and wherein the first amplifier network is located upstream from the second amplifier network and wherein the first and second networks respectively include first and second non-linear amplifiers that exhibit non-linear response characteristics to the RF signal and that introduce non-linear distortions into the RF signal and that the second network includes a filter that introduces linear distortions into the RF signal. The first correction circuit is located upstream from the series circuit for pre-correcting the RF signal in a manner to compensate for the linear and non-linear distortions introduced by the second amplifier network. A second pre-correction circuit is interposed between the first correction circuit and the first amplifier network for pre-correcting the RF signal to compensate for the non-linear distortions introduced by the first amplifier network. The second pre-correction circuit includes a third n…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.