Design and Analyze a Low Phase Noise LC VCO Using PMOS Varactor for ISM Band
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2016, Vol 4, Issue 8
Abstract
The explosive growth of short range wireless communication systems has lead to highly demand of compact radio frequency (RF) circuit with low power design. As voltage control oscillator (VCO) is the core block of RF systems. Phase Noise performance of LC VCOs is strongly dependent on the Quality Factor of the Inductors. The proposed VCO is designed with the staking switch two series transistors using current reuse topology and inversion-mode of PMOS varactor tank. As known, low cost CMOS technologies, the on-chip inductors have low quality factors compared to external inductors. But, using external inductors connected by traditional bonding technologies limits the integration capacity. In this work we have implemented LCVCO with PMOS varactor, is demonstrating an improved phase noise performance. The LC-VCO is implemented in 0.13μm CMOS technology operating at 2.4GHz ISM band. The phase noise obtained @ 1MHz offset -113.4dBc/Hz. VCO design techniques and design trade-offs are highlights in this work.
Authors and Affiliations
Shashank S. Kotgale, Prof. Sanjay Tembhurne
Keywords
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