Methods and apparatus to detect impedance at an amplifier output
US7449959B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2007 |
| Grant date | Nov 11, 2008 |
| Priority date | — |
| Expiry date | May 17, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45668
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus to detect impedance at an amplifier output are described. In one example, a method of determining a relative value of an amplifier output load may include determining a current provided to the amplifier output load in response to an input signal; determining a current provided to a reference load in response to a signal based on the input signal; comparing the current provided to the amplifier output load to the current provided to the reference load; and indicating a relationship between the amplifier output load and the reference load based on the current provided to the amplifier output load and the current provided to the reference load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.