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We report a novel NEMS-based heterodyne self-oscillator. By using a downmixing detection scheme, the NEMS motion piezoresistive signal at 20MHz is shifted down to few tens of kHz, thus avoiding the negative impact of stray capacitances. This technique allows the NEMS self-oscillator to benefit from its major advantages: a high dynamic range and a high signal to background ratio. However in this form,...
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