Adjustable gain range current mirror
US5321746A · kind A · utility
4Cited by
2References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1991 |
| Grant date | Jun 14, 1994 |
| Priority date | — |
| Expiry date | Feb 28, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A speakerphone with a varying gain current mirror circuit is provided. The varying gain current mirror circuit is within the DC control loop of the speakerphone such that by varying the gain of the current mirror circuit, the attenuation range of the speakerphone is correspondingly varied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.