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Cloud storage services, like S3, has drawn increasing popularity as primary data storage repository for users and enterprises because data can be conveniently accessed and shared through simplified web service based interface. However, users still desire the full use of the performance and capacity of their purchased storage resources, and to retain the POSIX I/O interface for accommodating general...
This paper presents the design of a variable gain amplifier for the frontend circuitry of 5-GHz high-speed digital storage oscilloscopes. The design challenge includes wide bandwidth and low distortion over the frequency range from dc to 5 GHz. The Cherry-Hooper amplifier configuration is used to tackle the issue. The designed variable gain covers the specified range from −2 to 38 dB. The gain flatness...
This paper realized a broadband LNA with cross-coupled technique to achieve a low noise characteristic. The current steering method and linear-in-dB control technique are employed in the amplifier to provide a wide range and linear-in-dB gain control. The dynamic gain range is about 27 dB with linearity error lower than ± 0.5 dB. The noise figure of LNA is about 3 dB at the maximum gain of 17 dB....
A direct conversion receiver for MB-OFDM UWB communication systems operating in 3.1-10.6GHz is presented. It integrates a low noise amplifier (LNA), quadrature mixers, and baseband 6th-order channel-select filters with programmable gain. The receive chain provides conversion gain of 77dB with 58dB control range. The NF is about 5.8dB in 3-5GHz, rising to 7.6dB at 8GHz, and still below 9.3dB up to...
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