Circuit and method of signal frequency conversion
US6263199A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1998 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Dec 14, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D2200/0084
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A mixer (20) has a differential transistor pair (22, 24) receiving first and second reference currents at first and second nodes (30, 34). An RF signal drives the differential transistor pair. A first switching circuit (44, 46) is coupled to the first node and a second switching circuit (52, 54) is coupled to the second node. An LO signal drives the first and second switching circuits. The first and second switching circuit each have first and second outputs that are cross-coupled at output nodes (48, 50) to provide a differential IF output current representative of the sum and difference between the frequency of the RF signal and the frequency of the LO signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.