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A Novel Chip Design Of Chopper-Stabilized Rail-To-Rail Operational Amplifier

PROCEEDINGS OF THE 2009 2ND INTERNATIONAL CONGRESS ON IMAGE AND SIGNAL PROCESSING, VOLS 1-9(2009)

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摘要
A novel chip design of chopper-stabilized operational amplifier is presented, chopper-wave modulation and demodulation is used in the architecture, and its 1/f noise is reduced remarkably. To extend common mode input voltage range, a novel rail-to-rail differential amplifier is adopted in the input-stage. The range of common mode input voltage is from zero to power supply voltage, and it consumes about 22 mu A quiescent current. When sine wave input signal frequency is 1kHz and output power is 0.5W, the THD of output signal is only 0.05%.
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关键词
Chopper-Stabilized,Rail-to-Rail,Operational Amplifier
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