Patent ID: 6868261

Claim:
A transmitter apparatus, comprising: a local oscillator (LO) generator that generates an LO signal having a tunable frequency f LO1 ; and a phase-locked-loop (PLL) that generates an output signal that is phase-locked to a reference signal, the output signal having a frequency f TX tunable within at least first and second alternative frequency bands responsive to the LO signal, the PLL including a feedback path for generating a feedback signal having a desired frequency f FB responsive to the frequencies f TX and f LO1 , wherein the frequency f FB is approximately equal to 1/6 the frequency f TX when the frequency f TX is in at least one of the first and second alternative frequency bands, and the frequency f LO1 is approximately equal to 7/6 the frequency f TX when the frequency f TX is in at least one of the first and second alternative frequency bands.