Patent ID: 7046977

Claim:
Wireless communication terminal for generating a plurality of radio frequency clock signals, for use by a plurality of application modules including at least one wireless communication module that comprises transmitter and receiver means for wireless communication and further application modules said clock signals having respective clock frequency characteristics and including at least first and second clock frequencies that are not integral multiples nor sub-multiples of each other nor of a third frequency, said wireless communication terminal comprising reference frequency means and fractional-N phase-locked loop frequency synthesizer means responsive to said reference frequency means, and automatic frequency control means for adjusting clock frequencies relative to received signals, wherein said reference frequency means is arranged to supply a common reference frequency signal to a plurality of said fractional-N phase-locked loop frequency synthesizer means that supply said first and second clock frequencies respectively for said application modules said wireless communication terminal comprising selective activation means for selectively activating and de-activating at least one of said plurality of phase lock loop means as required by the corresponding application module or modules, and at least one of said frequency synthesizer means having a synchronisation value different from the synchronisation value of the other frequency synthesizer means.