Low power wide dynamic range RMS-to-DC converter
US7342431B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 27, 2006 |
| Grant date | Mar 11, 2008 |
| Priority date | — |
| Expiry date | Aug 21, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An RMS to DC converter squares an a-c input signal to obtain a squared direct current voltage signal. The squared direct current voltage signal is applied to successive stages, each stage amplifying its received signal and detecting the amplified level of the signal within a confined range. The detected levels detected in the successive stages are added to produce an output d-c signal that is variable in linear proportion to logarithmic change in RMS voltage of the input signal. The voltage level of the squared direct current voltage signal can be clamped to a predetermined maximum voltage. To expand the range of detection, the squared direct current voltage signal is attenuated prior to detection in one or more of the stages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.