RF power detector and detection method
US9362898B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2014 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Dec 11, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/6933
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention provides an RF detection circuit and method using an envelope detector having an output connected to a first input of a differential amplifier and a reference storage capacitor to a second input of the differential amplifier. In a preferred implementation of the calibration mode, there is initial discharging of a reference storage capacitor, high speed charging of the reference storage capacitor until the differential amplifier output toggles, then slower discharging of the reference storage capacitor until the differential amplifier output toggles again. The resulting voltage is stored on the reference storage capacitor for use in a subsequent detection mode. This provides storage of an offset voltage which calibrates both the envelope detector differential amplifier functions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.