RF power sensor with chopping amplifier
US7652464B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2007 |
| Grant date | Jan 26, 2010 |
| Priority date | — |
| Expiry date | Nov 9, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G1/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An RF power detector having a wide dynamic range may comprise a chopping amplifier and is configured to detect pulsed high frequency RF signals. The chopping amplifier controlled by a bias current regulator amplifies and chops an RF signal by periodically enabling and disabling the amplifier according to a system clock. The chopped high frequency RF signal feeds a Schottky diode biased to operate in the square law region for weak signals. The Schottky diode voltage is tapped and high pass filtered. The voltage drives a logarithmic and linear converter. The converter outputs are summed to produce an output voltage that is a repeatable and stable monotonically increasing function of the RF power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.