Patent ID: 7412216
Filing Date: 2008-08-12
Classification: H03F,H04B

Abstract:
1. A radio transmitter, comprising: a frequency generator, for producing a signal at a first frequency; digital divider circuitry, for dividing the first frequency to produce a signal at a second frequency; a power amplifier, for amplifying the signal at the second frequency to produce an output signal at a desired power, further comprising control circuitry adapted to adjust a noise performance of the digital divider circuitry on the basis of the desired power, wherein the control circuitry is adapted to cause the digital divider circuitry to operate with a first noise performance at a first desired power and with a second noise performance at a second desired power, wherein the first noise performance is better than the second noise performance when the first desired power is higher than the second desired power, and the first noise performance is poorer than the second noise performance when the first desired power is lower than the second desired power.