Multiband radio signal transmitter/receiver
US7058380B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 26, 2001 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Jul 6, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/406
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
It is possible to achieve the miniaturization and the power saving of a hardware circuit as a multi-band radio signal transmitter/receiver, which can carry out a communication through a signal of a first communication method of transmitting and receiving a signal modulated by using information with regard only to a phase, for example, GSM/DCS, and a signal of a second communication method of transmitting and receiving a signal modulated by using an information of a phase and an amplitude, for example, UMTS (W-CDMA). A signal of PLL for a different reception channel is used as a local oscillation signal for a direct conversion reception, by using an image removing mixer or a reproduction dividing circuit, in each of GSM/DCS and UMTS modes, by switching a frequency of PLL in a transmitting IF signal in GSM/DCS/UMTS for each method, in order to generate a receiving signal used in GSM/DCS/UMTS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.