IIIT Hyderabad Publications |
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A 2.75-2.94 GHz Voltage Controlled Oscillator with Low Gain Variation for Quantum Sensing ApplicationsAuthors: Adithya Sunil Edakkadan,Kuntal desai,Abhishek Srivastava Conference: 35th International Conference on VLSI Design 2022 Pages: 6 Date: 2021-12-23 Report no: IIIT/TR/2021/119 Abstract—Quantum sensing applications such as nitrogen vacancy based magnetometry require phase locked loops (PLL), which can synthesize microwave frequencies in a narrow band near 2.87 GHz. Moreover, it is also required that the PLLs should have low noise and low jitter for high stability and fast settling time. These requirements seek low phase noise voltage controlled oscillator (VCO) with small variation in its gain (KVCO) within the desired tuning range. In this paper, we present a technique for designing a low phase noise VCO with low KVCO and small KVCO variation. To validate the proposed technique, an LC VCO has been designed and implemented in 0.18 µm CMOS process and post layout simulation results are presented. The simulation results show that the proposed LC VCO achieves KVCO variation of ±3.82% in the frequency range of 2.75 - 2.94 GHz and exhibits a phase noise of -118.64 dBc/Hz at an offset of 1 MHz, while consuming 9 mW of power from a 1.8 V supply. Full paper: pdf Centre for VLSI and Embeded Systems Technology |
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