3G radio
AssigneeAnalog Devices, Inc.
InventorsSimon Atkinson, Palle Birk
Life of this patent
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Abstract
A dual mode transceiver is provided in which a frequency synthesizer is shared by the transmit and receive channels.
Claims13
A transceiver comprising a transmitter and a receiver, wherein a frequency synthesizer is shared by the transmitter and the receiver, wherein the transmitter comprises an up-converter for receiving an input and up-converting it to an intermediate frequency by mixing the input with a first synthesized frequency, and wherein in a GSM mode a phase locked loop is used to translate a phase modulated signal at an output of the up converter onto a radio frequency carrier, and in a UMTS mode the intermediate frequency signal is up-converted to a transmit frequency and linearly amplified;
- and wherein the receiver comprises a direct conversion receiver having at least one direct down conversion channel for down converting a received signal.
Dependencies are inferred from the claim text.