Wireless transmitter having a modified translation loop architecture
US6526265B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1999 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Sep 14, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0018
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A transmitter for a wireless handset having a modified translation loop architecture. The transmitter includes a VCO that generates a modulated transmit signal having a frequency fTx, and a modulated signal source that generates a modulated LO signal with a frequency fLO. A mixer mixes the transmit signal with the LO signal to produce an IF signal having a frequency fIF. A first divider divides the LO signal frequency fLO by an integer M to generate a first comparison signal having a frequency fCF. A second divider divides the IF signal frequency fIF, after it is multiplied by an integer K, by an integer N to generate a second comparison signal having a frequency fCF. The transmit and LO signal frequencies have the relationship A phase detector coupled to the first and second comparison signals compares the phases of the signals and outputs a control voltage to the VCO proportional to any phase differences between the signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.