Patent ID: 6993314
Filing Date: 2006-01-31
Classification: H03L,H04B

Abstract:
1. A radio-frequency (RF) apparatus capable of transmitting radio-frequency signals, the radio-frequency apparatus comprising: transmitter path circuitry, including: a voltage-controlled oscillator circuitry configured to generate a first signal that has a first frequency; a divider circuitry being responsive to the first signal, the divider circuitry configured to generate a second signal that has a second frequency, wherein the second frequency equals the first frequency divided by a number; a first switch coupled to the voltage-controlled oscillator circuitry, the first switch configured to generate a switched first signal by selectively supplying the first signal to a first output; a second switch coupled to the divider circuitry, the second switch configured to generate a switched second signal by selectively supplying the second signal to a second output; and a feedback circuitry coupled to the voltage-controlled oscillator circuitry, the feedback circuitry configured to adjust the first frequency in response to a feedback signal derived from the switched first and second signals, and wherein the feedback circuitry comprises a third switch coupled to the first and second switches, the third switch configured to selectively supply as the feedback signal one of the switched first and second signals.