This paper presents work towards heterogeneous integration of high-efficiency power amplifiers (PAs) with tuner and biasing circuits implemented with micro-electro-machined elements. The PAs operate in switched mode with over 70% efficiency at X-band. Many such switched-mode amplifiers are used as the active portion of spatial power combining antenna arrays, with 2.3kW ERP at 8.4GHz at 65% drai...

In this paper, a highly linear and low noise CMOS active RF tracking filter for a digital TV tuner is presented. The Gm cell of the Gm − C filter is based on a dynamic source degenerated differential pair with an optimized transistor size ratio, thereby providing good linearity and high-frequency operation. The proposed RF tracking filter architecture includes two complementary parallel paths, ...

Pedagogical research demonstrates theories and practices of perception or production of melodic or harmonic “intonation”, i.e. the realization of pitch accuracy. There are software and hardware to help students improve intonation. Those tools have various functions. Nevertheless, they still miss something which could benefit users very much. Even worse, they are not easy to be revised. Most imp...

This paper presents work towards heterogeneous integration of high-efficiency power amplifiers (PAs) and tuner and biasing circuits implemented with micro-electro-machined elements. The PAs operate in switched mode with over 70% efficiency at X-band. Many such switched-mode amplifiers are used as the active portion of spatial power combining antenna arrays, with 2.3kW ERP at 8.4GHz at 65% drain...