Patent ID: 6828863
Filing Date: 2004-12-07
Classification: H03B,H03L,H04B

Abstract:
A frequency synthesizer arrangement for generating signals with frequencies for UMTS and GSMIGRPS frequency bands, comprisinga reference frequency source (201) for providing a signal of constant reference frequency, a first frequency synthesizer sub-unit (202) for transforming the signal of the reference frequency source (201) into a signal with a frequency in a range of a first type of frequency band, a second frequency synthesizer sub-unit (203) for transforming the signal of the reference frequency source (201) into a signal with a frequency a range of a second type of frequency band, said second frequency synthesizer sub-unit (203) further transforming the signal of the reference frequency source (201) into a signal with an intermediate frequency, and a third frequency synthesizer sub-unit (204) for transforming the signal of the reference frequency source (201) into an auxiliary signal with a fixed frequency which is used together with the signal of intermediate frequency for generating signals with frequencies in a range of a third and of a fourth type of frequency band, whereby a frequency mixer (227) mixes said signal from the second synthesizer sub-unit (203) with a signal derived from the auxiliary signal for forming a signal in a range of the third type of frequency band, and a frequency divider (241) derives a signal in a range of the fourth type of frequency band from said signal supplied by the frequency mixer (227) by dividing the frequency of said signal supplied by the frequency mixer (227) with an integer value.