Method and device for measuring the distortion of a high-frequency power amplifier and method and means for automatically equalizing a high-frequency power amplifier
US6239657A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 6, 1999 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Oct 6, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/3282
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An equalizer for automatically equalizing a high-frequency power amplifier having a reference carrier generator which generates a reference carrier from a measured input signal of the high-frequency power amplifier, and a first synchronous demodulator while generating an input envelope curve from the measured input signal and from the reference carrier. A second synchronous demodulator which generates an in-phase component of an output envelope curve from the measured output signal of the high-frequency power amplifier and from the reference carrier, as well as a phase shifter which shifts the phase of the reference carrier 90.degree. are also provided. A third synchronous demodulator generates a quadrature component of the output envelope curve from the measured output signal of the high-frequency power amplifier and from the reference carrier that has been shifted 90.degree. in phase. A controller generates an amplitude correction control signal and/or a phase correction control signal from the input envelope curve, the in-phase component of the output envelope curve and/or the quadrature component of the output envelope curve. The control characteristic and/or phase characterist…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.