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This paper reports comparisons between RTW VCO and LC QVCO 12 GHz PLLs, designed in a 130 nm CMOS technology for satellite communication applications. The phase noise at 1 MHz offset from the carrier is −102 dBc/Hz for the RTW VCO PLL and −98 dBc/Hz for the LC QVCO PLL, and the power consumption is 39 and 17 mW, respectively.
This paper reports comparisons between RTW VCO and LC QVCO 12 GHz PLLs, designed in a 130 nm CMOS technology. The phase noise at 1MHz offset from the carrier is −102 dBc/Hz for the RTW VCO PLL and −98 dBc/Hz for the LC QVCO PLL, and the power consumption is 39mW and 17 mW, respectively.
This paper presents the design methodology, simulation and measurement results of a CMOS 12 GHz rotary travelling wave voltage controlled oscillator. The different simulations (electrical using SPICE and electromagnetical using HFSS) are presented. These results are compared to a theoretical approach and measurements. The oscillator has been fabricated in a 0.13 mum RF-CMOS technology. The phase noise...
3 Sigma delta PLLs covering an octave have been integrated on one BiCMOS 0.35 um CSS (channel stacking switch) chip. The 3 PLLs can work simultaneously synthesizing the same frequencies or different frequencies. To minimize the dynamic coupling among the PLLs a complete calibration algorithm has been implemented while to avoid static coupling a large use of differential structure and other design...
This paper proposes a complete solution for the design and modeling of a switched-capacitor rotary traveling wave voltage controlled oscillator. The main point of the proposed methodology is to get a unique simulation and modeling environment, so we have focused on EDA tools interoperability. As a result, we get a complete flow for a 14.35 GHz VCO design and bottom-up verification, starting from electromagnetic...
This paper shows the feasibility of combining rotary traveling wave (RTW) oscillator and frequency switch tuning compensation based on a capacitor network to achieve a temperature and process variations robustness of voltage controlled oscillators (VCO). This concept has been proved by combining transistor level simulations for the active part and electromagnetic simulations for the transmission lines...
A cytogenetic monitoring study was carried out on a group of workers in clinical analysis laboratories to investigate the risk of occupational exposure to chronic low levels of chemicals.Thirty-four clinical laboratories have been involved in the study. In these laboratories, toxicants and analytical procedures utilized have been characterized. The individual occupational exposure of workers was assessed...
Mobile phones demand for smaller more integrated and cost effective solutions to implement the RF functions. This fully integrated direct conversion transceiver for GPRS GSM/DCS/PCS applications respond to all above-mentioned criteria. The chip is fulfilling the GPRS specs (settling time < 145µs) with a very low overall RX NF (2.8/3.6/3.9 dB for GSM/DCS/PCS), a very good overall TX phase error...
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