Abstract
The frequency synthesizer of Fig. 2.24 uses a cascade of two single-sideband mixers to implement all fourteen center frequencies of MB-OFDM UWB. This frequency synthesizer has a similar structure to the signal path of a wideband transmitter, and therefore broadband amplifiers maybe required to boost the signal at different places. An optimized combination of mixers and broadband amplifiers is needed to implement this wideband frequency synthesizer, and can help to reduce the level of in-band spurious tones.
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Farazian, M., Gudem, P.S., Larson, L.E. (2013). Design of Broadband Amplifiers in Digital CMOS Technology. In: Fast Hopping Frequency Generation in Digital CMOS. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-0490-3_5
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