Accuracy power detection unit
US8428534B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2011 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Oct 31, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/30
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Techniques are disclosed relating to radio frequency (RF) power detection. In one embodiment, a power detection unit is disclosed that includes a multiplier circuit configured to receive a first voltage of a voltage differential signal at gates of a first transistor pair and a second voltage of the voltage differential signal at gates of a second transistor pair. The first multiplier is configured to output a current that varies proportionally to a square of a voltage difference between the first and second voltages. In some embodiments, sources of the first transistor pair are coupled to sources of the second transistor pair, and the sources of the second transistor pair are coupled together. In some embodiments, the power detection unit is configured to compensate for mismatched transistors by applying offset voltages to bodies of transistors in the first and second transistor pairs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.