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A fully integrated flip-chip SiGe BiCMOS power amplifier for wireless local area network (WLAN) applications in the 2 GHz band is presented. In a front-end module (FEM) configuration and under 802.11ac signal excitation, the PA delivers 29 dB small-signal gain and −30.4 dB dynamic error vector magnitude (EVM) at 20.6 dBm, at nominal operating conditions (3.3 V, 25 °C). The PA tightly controls detector...
A SiGe BiCMOS, CMOS/SOI front-end module (FEM) for WLAN applications in the 2GHz band is presented. In the transmit mode it delivers 29dB small-signal gain and 3% EVM at 19.3dBm. In the receive mode, it achieves a noise figure of 1.85dB, 14dB gain, and an IIP3 level of 3dBm with 9mA current consumption. The FEM employs bias control circuitry that can be configured to address the linearity requirements...
A high linearity 4.9–5.9 GHz T/R FEM is presented. The FEM consists of a SiGe BiCMOS PA and a single-pole double-throw SOI switched LNA in a 3 × 3 × 0.6 mm QFN package. The Tx chain has > 31 dB gain and meets 3% EVM up to 22 dBm with harmonic and out-of-band emissions compliant to regulatory limits. The receive chain features 2 dB NF and 14 dB gain with −3 dBm IP1dB for LNA mode and 4.5 dB attenuation...
Dewey's ideas were slower to be accepted in Britain than elsewhere. Reasonsfor this are considered under four headings: pedagogical, epistemological,social and political. Of these, only the pedagogical ideas elicited a modicumof support in the first half of the century. Developments after 1960,however, led to widespread implementation of Dewey's principles mainly inthe primary education sector.
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