| 摘要 |
A MOS-FET differential amplifier with two field effect transistors T11, T12 has two Zener diodes, D11, D12, provided to protect the gate electrodes from static charges. These Zener diodes are arranged with mutually opposed polarity in a series path between the gate electrodes, and are only coupled to the substrate via a feedback arm of an amplifier transistor T13 connected in the output path. This results in the gate electrodes not being subjected to the gate-source voltage, but merely to the offset voltage between the two field effect transistors. <IMAGE> |
