Variable resister having resistance varying geometrically ratio and control method thereof
US8570139B2 · kind B2 · utility
3Cited by
7References
39Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 25, 2011 |
| Grant date | Oct 29, 2013 |
| Priority date | — |
| Expiry date | Dec 21, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/25
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is an analog amplifier for amplifying an analog signal and an analog filter, and in particular, an apparatus and method for controlling gain and cutoff frequency of the variable gain amplifier and the variable cutoff frequency filter that is capable of changing the gain and cutoff frequency. The variable resister includes a plurality of resister segments in the variable resister and, when a plurality of resistance candidates for the variable resister are arranged in order of size, the resistance candidates form a geometric series.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.