Biasing RMR with constant power
US7804658B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 6, 2007 |
| Grant date | Sep 28, 2010 |
| Priority date | — |
| Expiry date | Dec 2, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An RMR is biased with constant power. Voltages are applied across at least two variable resistors, which are coupled on opposing ends of the RMR, to establish a current to the RMR, wherein the current is based on the voltages and on resistance values of the at least two variable resistors. A voltage corresponding to the established current of the RMR is amplified. The amplified voltage is compared to a reference voltage, wherein the reference voltage is based on a target power for the RMR. The resistance values of the at least two variable resistors are modified so that the amplified voltage approaches the reference voltage. Modifying the resistance values of the at least two variable resistors in this manner is seen to bias the RMR with constant power, since the reference voltage is based on a target power for the RMR.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.