5 GHz low-noise bipolar and CMOS monolithic VCO's

CMOS and bipolar fully integrated VCOs for 5GHz low cost wireless applications are presented. These circuits are implemented in a 0.35µm BiCMOS SiGe process. A comparison of experimental results is carried out under fixed measurement conditions. Phase noise values at 1MHz frequency offset are -121dBc/Hz for a 4.82GHz bipolar VCO and -125dBc/Hz for a 5.46GHz CMOS VCO. To achieve the demonstration of 5GHz mixed applications using 0.35µm BiCMOS SiGe technology, 5GHz D flip-flops are designed and tested.