Differential parametric amplifier with modulated mems capacitors
作者： Timothy J. Denison , Thomas W. Kelly
DOI:
关键词: Signal 、 Operational amplifier 、 Fully differential amplifier 、 Mathematics 、 Charge amplifier 、 Amplifier 、 Operational transconductance amplifier 、 Electronic engineering 、 Common-mode signal 、 Direct-coupled amplifier
摘要: A micromachined variable capacitor structure is used as a modulation mechanism for differential parametric amplifier. The capacitance of the modulated by control signal while applied to structure. Modulation produces representative input voltage. This provided an Once amplified, demodulator demodulates amplified provide version signal. also allows internal feedback, which permits amplifier be galvanically isolated measurement number techniques are remove common mode and other errors from difference signal, thereby eliminating them output.
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