New approaches to measurement of operational amplifier common-mode rejection ratio in the frequency domain
Four test circuits for measuring operational amplifier common-mode rejection ratio (CMRR) are described and analysed. Sample results are presented for the uA741, characterising the variation of CMRR with frequency. Two new test circuits and a variation on an existing technique offer significant impr...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
IET
1995
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| Subjects: | |
| Online Access: | https://repository.londonmet.ac.uk/5279/1/cmr.pdf |
| Summary: | Four test circuits for measuring operational amplifier common-mode rejection ratio (CMRR) are described and analysed. Sample results are presented for the uA741, characterising the variation of CMRR with frequency. Two new test circuits and a variation on an existing technique offer significant improvements over previous methods and are capable of accurate measurements on high-performance operational amplifiers. |
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