A Capacitor-Free CMOS Low-Noise, Low-Dropout Regulator for Capacitive Micro-Machined Accelerometer Application

Abstract:

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A capacitor-free CMOS low-noise, low-dropout (LDO) regulator for Micro-accelerometer is presented. Noise performance of the regulator is studied from a theoretical point of view and a chopper stabilized error amplifier is designed to minimize output noise. By adopting pole-zero frequency compensation technique, the proposed LDO regulator, which is independent of an off-chip capacitor, provides high closed-loop stability when the load current is switched by micro-accelerometer. The proposed LDO is designed and fabricated on a 2μm CMOS process. From the simulation results, it shows that the line regulation is 3.5mV/V and the load regulation is 0.33mV/mA when the load current changes from 0 to 30 mA. The experimental results show that the output noise of the regulator is less than 180nV/sqrt(Hz) at low frequency

Info:

Periodical:

Edited by:

Xiaohao Wang

Pages:

97-102

DOI:

10.4028/www.scientific.net/KEM.483.97

Citation:

B. J. Lv et al., "A Capacitor-Free CMOS Low-Noise, Low-Dropout Regulator for Capacitive Micro-Machined Accelerometer Application", Key Engineering Materials, Vol. 483, pp. 97-102, 2011

Online since:

June 2011

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Price:

$35.00

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