Graduate Thesis Or Dissertation
 

A chopper-stablized CMOS operational amplifier

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  • The chopper-stabilized operational amplifier has good low frequency noise properties. Unfortunately a simple technique for simulation of the chopper-stabilized operational amplifier has not been available. This thesis describes the implementation of a differential amplifier using chopper stabilization and its circuit modeling for the SPICE simulation. This circuit has been designed using a 3-urn p-well CMOS technology. The chopper amplifier has 89 dB dc gain and an output voltage swing from 0.3V to 12V with a 12V power supply. The equivalent input noise is only 12 nV/√Hz at 1 Hz with 10 nV/√Hz as the thermal noise.
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