High-frequency signal level detection apparatus and high-frequency signal receiver apparatus using the same
US7551908B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2004 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Feb 2, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3068
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a high-frequency signal level detection apparatus for detecting an inputted signal level of a high-frequency signal, an AGC circuit executes an AGC on an intermediate frequency (IF) signal obtained by converting a frequency of a received high-frequency signal, using an RFAGC value and an IFAGC value for controlling gains of the high-frequency signal and the IF signal, respectively, based on the IF signal so that an output level of the IF signal is substantially constant. A controller previously measures first and second relational data, indicating an RFAGC value and an IFAGC value relative to the inputted signal level of the received high-frequency signal, respectively, measures the RFAGC and IFAGC values when a high-frequency signal to be measured is received, and detects the inputted signal level of the received high-frequency signal using the measured first and second relational data based on the measured RFAGC and IFAGC values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.