5.1 A 60V auto-zero and chopper operational amplifier with 800kHz interleaved clocks and input bias-current trimming

@article{Kusuda201551A6,
  title={5.1 A 60V auto-zero and chopper operational amplifier with 800kHz interleaved clocks and input bias-current trimming},
  author={Yoshinori Kusuda},
  journal={2015 IEEE International Solid-State Circuits Conference - (ISSCC) Digest of Technical Papers},
  year={2015},
  pages={1-3}
}
Precision operational amplifiers (opamp) with 30V supply operation have been widely used to support industrial, instrumentation, and other applications [1]. Most of them have been realized with BJT or JFET processes [1] to offer voltage noise PSD better than 10nV/√Hz and offset voltage drift better than 1μV/°C. Recently, opamps with similar specifications have become available using CMOS based processes [2-4], which can offer a cheaper wafer price. Auto-zeroing and/or chopping are used as… CONTINUE READING

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A 3μV-Offset Operational Amplifier with 20nV/√Hz Input Noise PSD at DC Employing Both Chopping and Autozeroing

A.T.K. Tang
ISSCC Dig. Tech. Papers, • 2002
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