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| Number | Title | Issue Date |
| 4931745 | Low noise chopper stabilized amplifier and method of operation A chopper op amp (10) is provided having an input chopping waveform (70). Input chopping waveform E (70) is used to generate waveform C (76) and waveform D (78) for activating switch C (36) and switch D (38), respectively. The high period of waveforms C (... | 06/05/1990 |
