Niveditha Arumugam

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—MEMS-based oscillators have recently become a topic of interest as integrated alternatives are sought for quartz-based frequency references. When seeking a programmable solution, a key component of such systems is a low power, low area fractional -N synthesizer, which also provides a convenient path for compensating changes in the MEMS resonant frequency(More)
A MEMS-based clock generator achieves sub-ps jitter in 0.18um CMOS. Key enabling techniques include a 48MHz MEMS oscillator, a reference doubler, a linear XOR-based PFD, a switched-resistor loop filter using accumulation mode NMOS varactors, and native NMOS devices with an RC filter. The overall output at 156.25MHz achieves an integrated phase jitter of(More)
MEMS-based programmable oscillators have emerged as a promising alternative to crystal-based frequency references, with previously reported work demonstrating sub-ps integrated jitter [1]. Here we show frequency stability better than ±0.5ppm from-40 to 85°C, along with Allan Deviation (i.e., long term jitter) better than 0.005 ppm for 0.1, 1, and 10 second(More)
This study aimed to estimate normative range for reaction time using ruler drop method for school-going South Asian children between 6 and 12 years of age. A cross-sectional study was used to evaluate the reaction time for 204 children. Normal values for each age group were obtained. The results of multiple linear regressions showed a decrease in the(More)
MEMS resonators have recently emerged as an alternative structure to crystal resonators in providing frequency references which achieve better than 50 ppm accuracy over the industrial temperature range. As illustrated in Fig. 13.1.1, a programmable oscillator utilizing a MEMS resonator is achieved by wire bonding a MEMS resonator die to a CMOS die that(More)
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