Transconductor having high linearity and programmable gain and mixer using the same
US7973587B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2008 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Mar 21, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45596
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A mixer having high linearity and an associated transconductor combining programmable gain amplifier and mixer functions are provided. The transconductor includes first and second resistors, a differential amplifier, first and second feedback circuits, and first and second transistors. A differential voltage signal is inputted to first and second input ends of the differential amplifier via the first and second resistors. The first and second feedback circuits are provided between a first output end and the first input end, and a second output end and the second input end of the differential amplifier, respectively. The first output end outputs a first output signal for controlling a first current passing through the first transistor. The second output end outputs a second output signal for controlling a second current passing through the second transistor. The first current and the second current determine a differential current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.