Abstract
A mixer-first receiver is proposed, which uses an overlap-suppressed local oscillator (LO) signal for the mixer switching. A sinusoidal LO wave can be shaped into a sharper waveform by adding a second-harmonic component to the fundamental one. This is readily achieved by integrating accumulation MOS varactors with LO buffers. The receiver is implemented in a 28-nm bulk CMOS and achieves an input 1-dB gain compression power in the range of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$-$</tex-math> </inline-formula> 12.6 to <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$-$</tex-math> </inline-formula> 14.3 dBm and a noise figure (NF) in the range of 8.4–9.6 dB at frequencies of 24–29 GHz while consuming 12.6-mW power.
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