Patent ID: 7772929

Claim:
A device for frequency synthesis comprising: an oscillator driven for generating, at a frequency out of a set of at least two possible output frequencies, an output signal; a control device for driving the oscillator, wherein the control device, for the purpose of generating a desired frequency that is not included in the set of possible output frequencies is configured to drive the oscillator to alternately generate at least two different output frequencies, out of the set of possible output frequencies, such that an average value of the generated output frequencies over a certain time period is the desired frequency plus or minus a relative frequency error, wherein the control device is configured to drive the oscillator such that the at least two generated output frequencies are alternated at a selected average switching frequency that is less than the at least two possible output frequencies; and a frequency divider connected to the output of the oscillator and configured to reduce the relative frequency error generated at the selected average switching frequency, wherein the selected average switching frequency is selected to be smaller than a switching frequency necessary to obtain a desired relative frequency error without the frequency divider.