Patent ID: 7092675
Filing Date: 2006-08-15
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, the voltage-controlled oscillator circuitry configured to generate an output signal having an adjustable frequency in response to first and second control signals; a first feedback circuitry, the first feedback circuitry being responsive to the output signal of the voltage-controlled oscillator circuitry, the first feedback circuitry configured to provide the first control signal to the voltage-controlled oscillator circuitry; and a second feedback circuitry, the second feedback circuitry being responsive to the output signal of the voltage-controlled oscillator circuitry, the second feedback circuitry configured to provide the second control signal to the voltage-controlled oscillator circuitry, wherein the first control signal coarsely adjusts the frequency of the output signal of the voltage-controlled oscillator circuitry to a desired frequency, and wherein the second signal fine tunes the frequency of the output signal of the voltage-controlled oscillator circuitry to the desired frequency.