Circuit for receiving and transmitting signals and method
US6137997A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1998 |
| Grant date | Oct 24, 2000 |
| Priority date | — |
| Expiry date | Aug 4, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/403
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A circuit (30) and method for translating a spectrum of a modulated signal. The circuit (30) includes a mixer (33), a summing device (36), and a synthesizer (37). The circuit (30) receives and transmits modulated Radio Frequency (RF) signals. The synthesizer (37) generates a transmitter modulated RF signal (TX.sub.RF) using a modulating signal (TX.sub.MOD). The mixer (33) generates an intermediate frequency signal (IF) by mixing a receiver modulated RF signal (RX.sub.RF) with the transmitter modulated RF signal (TX.sub.RF). The summing device (36) removes modulation of the transmitter modulated RF signal (TX.sub.RF) by combining the intermediate frequency signal (IF) with the modulating signal (TX.sub.MOD).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.