Chang, Yu TengYu TengChangChang, Chin ChiaChin ChiaChangHSIN-CHIA LU2023-08-012023-08-012022-01-019784902339567https://scholars.lib.ntu.edu.tw/handle/123456789/634338In this paper, we propose a complementary quadrature voltage-controlled oscillator (QVCO) at 28 GHz. This work combines the current re-used and parallel coupling technique in QVCO. We also use the complementary device to implement the current re-used technique to save dc power. To avoid stacking structure, the quadrature-phase is achieved by the parallel coupling technique. The measured tuning range is 5.16 % and the measured lowest phase noise is -103.4 dBc/Hz at 1 MHz offset from carrier frequency at 28.36 GHz. The measured phase error is less than ± 3° across all tuning frequencies. The core dc power consumption is only 21 mW for 1.8 V supply voltage. To our best knowledge, this QVCO has the lowest phase error and an accurate quadrature phase.cross-couple pair (CCP) | current-reused | parallel coupling technique | quadrature voltage-controlled oscillator (QVCO)conference paper2-s2.0-85146675726https://api.elsevier.com/content/abstract/scopus_id/85146675726