CRYSTAL-LESS TRANSCEIVERS

摘要

The present invention relates to an apparatus and a system having at least one of a transmitter portion or apparatus for transmitting a transmission signal and receiver portion or apparatus for receiving a transmission signal, and to a method of operating such an apparatus and system. A reference frequency is generated at an oscillator circuit (82) which is used for frequency conversion in at least one of the transmitter and receiver portion, and the transmission signal is filtered at a filter circuit (10) before it is input to the transmitter portion or after it is output from the receiver portion. At least one of a physical or electronic coupling of at least one bandwidth parameter at the filter circuit (10) to the oscillator circuit (82) is provided to thereby relax accuracy requirements at said oscillator circuit. Thereby, the oscillator circuit can be configured without crystal resonator element(s) and the size of the apparatus and system can be reduced.