Device for controlling the amplitude and the phase of a radio frequency signal
US6172562A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1999 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Jan 6, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/198
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital device for controlling the amplitude and the phase of a radio frequency signal includes a variable digital attenuator, a variable digital phase-shifter, and a distributor having one input and two outputs for dividing the radio frequency signal into a first signal part and a second signal part. A digital amplitude control first channel connected to an output of the distributor includes the variable digital attenuator for controlling the amplitude of the first signal part. A digital phase control second channel connected to the other output of the distributor in parallel with the first digital control channel includes the variable digital phase-shifter for controlling the phase of the second signal part. A recombiner has one output and two inputs respectively connected to the outputs of the two digital control channels and recombines the controlled two signal parts. Such devices include predistortion linearizers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.