Power amplifier having nested amplitude modulation controller and phase modulation controller
US5430416A · kind A · utility
163Cited by
5References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1994 |
| Grant date | Jul 4, 1995 |
| Priority date | — |
| Expiry date | Feb 23, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C3/09
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Transmitting signals containing amplitude modulated (AM) and phase modulation (PM) components requires a transmitter having AM and PM control loops. The PM control loop provides phase modulation, frequency translation and phase predistortion for the transmitter. The phase predistortion/correction is accomplished by using an oscillator, thus, the amount of PA phase correction is essentially unlimited. Additionally, the PM control loop is nested about a power amplifier (PA), allowing the PM control loop to correct for any distortion introduced by the PA.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.