|Title:||A Low-Phase-Noise K-Band CMOS VCO||Authors:||Hsieh, Hsieh-Hung
|Keywords:||Capacitive feedback;CMOS radio frequency (RF);differential colpitts oscillators;K-band;LC-tank;low phase noise;voltage-controlled oscillators (VCOs)||Issue Date:||Oct-2006||Publisher:||Taipei:National Taiwan University Dept Elect Engn||Journal Volume:||VOL. 16||Journal Issue:||NO. 10||Start page/Pages:||-||Source:||IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS||Abstract:||
A novel circuit topology for low-phase-noise voltage
controlled oscillators (VCOs) is presented in this letter. By employing
a PMOS cross-coupled pair with a capacitive feedback,
superior circuit performance can be achieved especially at higher
frequencies. Based on the proposed architecture, a prototype VCO
implemented in a 0.18- m CMOS process is demonstrated for
K-band applications. From the measurement results, the VCO
exhibits a 510-MHz frequency tuning range at 20 GHz. The output
power and the phase noise at 1-MHz offset are 3 dBm and
111 dBc/Hz, respectively. The fabricated circuit consumes a dc
power of 32 mW from a 1.8-V supply voltage.
|Appears in Collections:||電機工程學系|
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