A 5.6-GHz 1-V Low Power Balanced Colpitts VCO in 0.18-mu m CMOS Process

作者：Huang Jhin Fang^*; Lai Wen Cheng; Huang Kun Jie

来源：IEICE - Transactions on Electronics, 2013, E96C(6): 942-945.

DOI：10.1587/transele.E96.C.942

• voltage controlled oscillator
• colpitts VCO
• complementary cross-coupled VCO

A 5.6-GHz 1-V balanced LC-tank Colpitts voltage controlled oscillator is designed and implemented with a TSMC 0.18-mu m CMOS process. This proposed Colpitts VCO circuit adopts two single-ended complementary LC-tank VCOs coupled by two pairs of varactors. The proposed VCO operates at low power consumption because it has the same dc current path as the np-MOSFETs. The Measured results of the proposed VCO achieve tuning range of 670 MHz from 5.23 to 5.9 GHz while the controlled voltage is tuned from 0 to 1-V, phase noise of -118.8 dBc/Hz at I MHz offset frequency from the carrier of 5.6 GHz and output power of -10.97 dBm at the supply voltage of 1 V. The power consumption of the core circuit is 1.79 mW and the chip area including pads is 0.451 (0.55 x 0.82) mm(2).

• 出版日期2013-6