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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...
This work proposes the use of a capacitively degenerated transconductor to construct an RF bandpass filter. The fundamental theoretical elements for the application of this technique are provided. First, the impedance seen from the source/emitter of a transistor with capacitive degeneration and an LC tank connected at its gate/base is analyzed. The conditions under which this impedance exhibits a...
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