A 33aFrms34pF Base Capacitance, 192fF Input Range 500kHz Sampling Frequencycapacitancetovoltage Converter using a Resonant LC Bridge

This paper presents a resonant LC bridge to enhance the performance of the capacitancetovoltage converterCVCby leveraging its passive gain to improve resolution and power consumptionThe proposed CVC achieves <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$1.56 \text{mV} / \text{fF}$</tex> gain <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$33.1 \text{aF}_{\text{rms}}$</tex> resolution at 500 kHz sampling rate while consuming <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$2.85 \mu \mathrm{W}$</tex> with 3.4 pF base capacitanceequivalent to <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$3.24 \text{fJ} /$</tex> conversionstep WaldenFoMFoMwand 179.12 dB Schreier FoMFoMs