Round-robin sensing device and method of use

摘要

A round-robin sensing device is disclosed. The round-robin sensing device comprises a MEMS device, wherein the MEMS device includes first and second sense electrodes. The round-robin sensing device also comprises a multiplexer coupled to the first and second sense electrodes, at least one sense amplifier coupled to the multiplexer, a demodulator coupled to the at least one sense amplifier, and an integrate and dump circuit coupled to the demodulator. Finally, the round-robin sensing device comprises an analog-to-digital converter (ADC) coupled to the de-multiplexer, wherein the multiplexer, the at least one sense amplifier and the demodulator provide a continuous time sense path during amplification that is resettable and wherein the integrate and dump circuit and the ADC provide a discrete time processing path.

主权项

1. A round-robin sensing device comprising:
a MEMS device; wherein the MEMS device includes first and second sense electrodes; a multiplexer coupled to the first and second sense electrodes; at least one sense amplifier coupled to the multiplexer; a demodulator coupled to the at least one sense amplifier; an integrate and dump circuit coupled to the demodulator; and an analog-to-digital converter (ADC) coupled to a de-multiplexer; wherein the multiplexer, the at least one sense amplifier and the demodulator provide a continuous time sense path during amplification that is resettable and wherein the integrate and dump circuit and the ADC provide a discrete time processing path when switching between the first and second sense electrodes.