Graduate Institute of Electronics Engineering, National Taiwan UniversityKuo, Wei-MinWei-MinKuoCressler, John-D.John-D.CresslerChen, Yi-JanYi-JanChenJoseph, Alvin-J.Alvin-J.Joseph2006-11-152018-07-102006-11-152018-07-102005http://ntur.lib.ntu.edu.tw//handle/246246/2006111501264967A 21 GHzinductorless differential quadrature ring oscillator suitable for use in clock & data recovery circuits in optical network receivers is presented. Implemented using a commercially available 0.18 mm 120GHzSiGe HBT technology, the circuit consists of only 22 SiGe HBTs & 4 resistors, & occupies an active area of less than 120150 mm2. The circuit operates on a 3.0V power supply & dissipates at most 152mW of power. The oscillation frequency is tunable from 18.33 to 21.19 GHzwhile the output power varies from 13.5 to 9.0 dBm. A phase noise of 83.33 dBc/Hzat 1 MHzoffset from the carrier frequency of 21.19 GHzis achieved. This results in an oscillator figureof- merit of 148.03, which is comparable to other ring oscillators published in literature operating in similar frequency range.application/pdf271395 bytesapplication/pdfzh-TWSilicon-germaniumHeterojunction bipolar transistorSiGe HBTRing oscillatorQuadratureDifferentialjournal articlehttp://ntur.lib.ntu.edu.tw/bitstream/246246/2006111501264967/1/3855.pdf