Multiband radio signal transmitter/receiver

Details Multiband radio signal transmitter/receiver Multiband radio signal transmitter/receiver

2006-06-06

2006-06-06

Maung, Nay (Department: 2684)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S552100, C455S553100, C455S208000

Reexamination Certificate

active

07058380

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.

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patent: 6735426 (2004-05-01), Pau

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