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This paper presents a complete top-down design and experimental results for a fast-hopping 11-band 3-10-GHz frequency synthesizer. The system requirements for a synthesizer in an ultrawideband (UWB) radio are discussed. The synthesizer specifications for 480-Mb/s- and 1-Gb/s-data-rate multiband orthogonal-frequency-division-multiplexing UWB radios using quadrature phase shift keying and 16-quadrature...
Built-in self test techniques for local oscillator phase noise, RF front-end circuits, baseband building blocks and transceiver loop-back are described. CMOS implementation of integrated RF test components, including RF detectors and phase discriminators are introduced. These devices eliminate the need for expensive external test equipment. The presented test strategies can also be used at wafer-level...
A fast-switching carrier frequency generator for multi-band UWB radios is presented. It generates 11 carrier frequencies in quadrature in the range of 3.7-10GHz from a single frequency source. The architecture consists of a series of dividers, single sideband mixers with filtering and multiplexers. The IC is implemented in a 0.25mum SiGe BiCMOS technology and measured in a QFN package. With an active...
An 11-band 3.4-10.3GHz direct conversion receiver for MB-OFDM UWB is implemented in a 0.25mum BiCMOS process. It includes an RF front-end with interference rejection at 5.25GHz, a frequency synthesizer generating 11 carrier tones in quadrature with fast hopping, and a linear phase baseband section with 42dB of gain programmability. The packaged IC mounted on FR-4 substrate provides maximum gain of...
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