Mohammad B. Vahidfar

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Receiver ICs realized in CMOS technology leverage the narrowband nature of wireless standards to meet specifications at low power levels. The advent of wideband systems, e.g. software-defined radios and UWB technology, is determining new emphasis on innovative techniques for key RF circuit blocks, and on synthesizers in particular [1-4].(More)
An ultra-low-voltage low-power high-speed class-AB operational amplifier with a new structure is presented. A new technique called "Slew Boost" is introduced to improve amplifier's large-signal settling behavior, most useful in switched-capacitor circuits such as pipelined ADCs, sigma delta modulators, etc. The proposed op-amp has been designed to be(More)
— Software defined radios are a topic of intense research and constitute one key industry need for future generation wireless products. In this paper, we investigate the down-conversion mixer, a particularly challenging block, due to the stringent dynamic range requirements set by cell-phone applications and the wide operation bandwidth. The proposed mixer(More)