Title :
A 4 GHz fractional-N frequency synthesizer
Author :
Ahola, Rami ; Halonen, Kari
Author_Institution :
Electron. Circuit Design Lab., Helsinki Univ. of Technol., Espoo, Finland
Abstract :
A 4 GHz fractional-N frequency synthesizer for telecommunications applications is presented. The synthesizer includes a multiple-modulus ECL prescaler capable of operating at input frequencies of up to 4.3 GHz with a power dissipation of 17.6 mW, a third-order MASH modulator that controls the modulus of the prescaler, and a phase detector and chargepump that does not suffer from dead-zone problems. The synthesizer achieves a close-in phase noise of -66 dBc/Hz while dissipating only 27.7 mW from a 2.7 V supply. The synthesizer has been implemented in a 0.35 m BiCMOS technology
Keywords :
BiCMOS integrated circuits; frequency synthesizers; mixed analogue-digital integrated circuits; phase detectors; prescalers; 0.35 micron; 17.6 to 27.7 mW; 2.7 V; 4.3 GHz; ASIC; BiCMOS technology; chargepump; fractional-N frequency synthesizer; mixed-signal IC; multiple-modulus ECL prescaler; phase detector; prescaler modulus control; telecommunications applications; third-order MASH modulator; Bandwidth; Frequency conversion; Frequency synthesizers; Multi-stage noise shaping; Phase locked loops; Phase modulation; Phase noise; Power dissipation; Quantization; Voltage-controlled oscillators;
Conference_Titel :
Electronics, Circuits and Systems, 2000. ICECS 2000. The 7th IEEE International Conference on
Conference_Location :
Jounieh
Print_ISBN :
0-7803-6542-9
DOI :
10.1109/ICECS.2000.911527
