Marvellworld Trade Ltd.

Invensense, Inc.

Luca Collamati

Alessandro Savo

Federico Mazzarella

Giuseppe De Vita

Maurizio Costagliola

A capacitive sensing charge amplifier, e.g., in a direct current (DC) feedback network, may incorporate a switching capacitor, including a first control switch and a second control switch, which receives a switching signal to charge and discharges the switching signal to a virtual ground of a sense amplifier. Noise incorporated into the output of the sense amplifier (e.g., a MEMS output signal) is filtered by a demodulation signal at a demodulator such that the period average noise at the demodulator output equals zero. The time varying nature of the switching capacitor resistance generally reshapes the system's post-demodulation noise to reduce its low frequency output noise.

DC restore scheme for capacitive sensing amplifiers with optimal noise filtering

A power rectifier rectifies alternating electric current by using a controller in the power rectifier to control a first delay circuit in the power rectifier to turn on a high side switch in the power rectifier, wherein the high side switch provides a path for power from an input voltage line of the power rectifier to an output voltage line of the power rectifier. The controller controls a second delay circuit in the power rectifier to maintain the high side switch in an on state to change a switching state of the high side switch based on detection, by a current inversion detector, of a current inversion associated with the input and output voltage lines of the power rectifier.

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Jesi, Italy

Luca Collamati