A 4.2/7.2 G H z dual‐band LC VCO in 0.13 mm S i G e B i CMOS

This article presents a dual‐band LC voltage switched oscillator (VCO), which can be regulated between 3.6–4.5 GHz and 6.5–7.8 GHz frequency bands. The VCO is realized employing a tunable LC tank with switched capacitors, which makes the dual‐band operation available. The VCO has been implemented in 0.13 μm SiGe BiCMOS technology, and draws around 5 mA and 5.2 mA in the core circuit with a 1.6 V supply at 4.22 GHz and 7.3 GHz, respectively. The measured phase noise performance of the VCO are −103.36 dBc/Hz for 4.22 GHz and −104.69 dBc/Hz for 7.3 GHz at 3 MHz offset. The core area of the chip is 0.13 mm 2 based on the use of a symmetric inductor. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:1439–1441, 2017