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In this paper, we introduce the multiphase switched-capacitor power amplifier (MP-SCPA). The MP-SCPA is a digital power amplifier (DPA) that achieves a linear output response using a vector summation of two amplitude weighted constant phase signals. In this way, it avoids using a wideband phase modulator that is required in other DPAs. The MP-SCPA is subject to non-linearity induced by bondwires and...
This paper presents a 12 bit split-array switched-capacitor power amplifier (SA-SCPA) to improve resolution of an SCPA and hence the linear dynamic range. An attenuation capacitor added between two sub-arrays allows a smaller ratio between the smallest and largest capacitors in the array, accommodating better matching. To compromise between efficiency and linearity, 4 binary bits are chosen for the...
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