Patent ID: 8744380

Claim:
A method for conversion of signals in a communication device, comprising: generating a first signal S fs using a frequency synthesizer having a predetermined synthesizer frequency tuning range which extends from about 1516 MHz to 2088 MHz; generating a second signal S d within any one of a plurality of predetermined second frequency tuning ranges, by selectively performing a first frequency dividing operation on said first signal in accordance with any one of a plurality of predetermined divisor values; communicating the second signal S d to a frequency conversion unit which includes a digital broadband phase splitter and a pair of mixers, including a first mixer and a second mixer; performing in said digital broadband phase splitter a second frequency dividing operation to produce first and second quadrature signals which have a phase offset of about 90°; communicating said first and second quadrature signals respectively to said first and second mixers; and using said first and second quadrature signals in each of said first and second mixer to modulate or demodulate a third signal by performing a frequency conversion operation on said third signal.