Bruno W. Garlepp

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—This paper describes an adaptively equalized, dual-mode (PAM2 one-tap DFE/PAM4) 0.13 m CMOS transceiver chip, and the techniques used to continuously adapt the link. Interestingly, with only minor modification the same hardware needed to implement a PAM4 system can be used to implement a PAM2 loop-unrolled single-tap decision-feedback equalization (DFE)(More)
– High speed serial data transceivers often employ sophisticated communication techniques to balance out the effects of material loss and reflections. Link control hardware is required to initialize and adapt the link in a variety of signaling environments, often using loops with time constants which are orders of magnitude larger than the data unit(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)
—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)
In this paper, a new technique for characterization of digital-to-analog converters (DAC) used in wideband applications is described. Unlike the standard narrowband approach, this technique employs Least Square Estimation to characterize the DAC from dc to any target frequency. Characterization is performed using a random sequence with certain temporal and(More)
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