| 摘要 |
Chopper stabilized operational amplifiers are in common use. One drawback of these amplifiers, however, is that there is an inherent tone present at the chopper frequency. Conventional circuits have attempted to reduce the effects of this tone by using various filtering schemes, such as a notch filter. Here, however, a track-and-hold circuit is used in conjunction with matched amplifiers to compensate for this tone.
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