Dual-mode radio architecture
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United States of America Patent
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Jul 3, 2001
Grant Date -
N/A
app pub date -
Apr 22, 1999
filing date -
Feb 16, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
This invention relates to a radio transceiver operable in multiple modes. The transceiver is operable, in one embodiment, to communicate with digital and analogue modulation format cellular radio systems. The handset utilizes a novel frequency plan and architecture to enable a minimum level of complexity for dual-moe operation. The frequency plan preferably uses two local oscillators 1LO, 2LO to general all the required frequencies for both the digital and analogue modulation format transceivers, derived from a single reference crystal oscillator. A radio architecture is used to enable switchable dual-mode operation with maximum commonality of functional blocks to facilitate silicon integration.
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