Amplifier for multi-use of single environmental sensor
US7633386B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 18, 2006 |
| Grant date | Dec 15, 2009 |
| Priority date | — |
| Expiry date | Dec 2, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45524
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A detection system in which a single sensor is employed to detect an extensive range of a parameter. The output signal from the sensor is fed to the input of the electrical circuit, having a feedback loop, wherein the electrical circuit has a non-linear transfer characteristic. The non-linear transfer characteristic is achieved by changing the behavior of the feedback loop of the electrical circuit at a predetermined level of input signal. The output of the circuit has a proportional relationship with the input until the input signal reaches this predetermined value, whereupon the behaviors of the feedback loop changes and the relationship of the output to the input of the circuit changes. While the input signal is above the predetermined value, the output of the circuit has a linear but disproportionate relationship with the input at a gradient different to that when the input signal is below the predetermined value. Further, the behavior of the feedback loop changes to create a knee point in the response between the proportional and the linear parts of the characteristic. In this way, an overall non-linear transfer characteristic is produced by the electrical circuit, the transfe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.