Abstract: A multi-mode PLL frequency synthesizer of a wireless multi-mode transceiver is provided which includes a reference frequency source providing an oscillator signal with a constant reference frequency, a first frequency synthesizer subunit for converting the signal into carrier signals with frequencies in the range of a first frequency band, a second frequency synthesizer subunit for transforming the oscillator signal into carrier signals having frequencies in the range of a second frequency band, and a third frequency synthesizer subunit for converting the oscillator signal into an auxiliary signal with a fixed frequency. The auxiliary signal is used together with the carrier signals of the second frequency band to generate carrier signals with frequencies in the range of a third and fourth frequency band.

Abstract: A multi-mode PLL frequency synthesizer of a wireless multi-mode transceiver is provided which includes a reference frequency source providing an oscillator signal with a constant reference frequency, a first frequency synthesizer subunit for converting the signal into carrier signals with frequencies in the range of a first frequency band, a second frequency synthesizer subunit for transforming the oscillator signal into carrier signals having frequencies in the range of a second frequency band, and a third frequency synthesizer subunit for converting the oscillator signal into an auxiliary signal with a fixed frequency. The auxiliary signal is used together with the carrier signals of the second frequency band to generate carrier signals with frequencies in the range of a third and fourth frequency band.

Abstract: A frequency synthesizer arrangement for generating signals with frequencies for UMTS and GSM/GPRS frequency bands and a mobile terminal with a respective frequency synthesizer arrangement are proposed, comprising a reference frequency source for providing a signal of constant reference frequency, a first frequency synthesizer sub-unit for transforming the signal of the reference frequency source into a signal with a frequency in a range of a first type of frequency band, a second frequency synthesizer sub-unit for transforming the signal of the reference frequency source into a signal with a frequency in a range of a second type of frequency band, whereby the second frequency synthesizer sub-unit further transforms the signal of the reference frequency source into a signal with an intermediate frequency, and a third frequency synthesizer sub-unit transforms the signal of the reference frequency source into an auxiliary signal with a fixed frequency which is used together with the signal of intermediate freque

Abstract: A frequency synthesiser arrangement for generating signals with frequencies for UMTS and GSM/GPRS frequency bands and a mobile terminal with a respective frequency synthesiser arrangement are proposed, comprising a reference frequency source for providing a signal of constant reference frequency, a first frequency synthesiser sub-unit for transforming the signal of the reference frequency source into a signal with a frequency in a range of a first type of frequency band, a second frequency synthesiser sub-unit for transforming the signal of the reference frequency source into a signal with a frequency in a range of a second type of frequency band, whereby the second frequency synthesiser sub-unit further transforms the signal of the reference frequency source into a signal with an intermediate frequency, and a third frequency synthesiser sub-unit transforms the signal of the reference frequency source into an auxiliary signal with a fixed frequency which is used together with the signal of intermediate freque