| 摘要 |
In a multistage source follower amplifier having input and output terminals, an output source follower amplifier has an output drive transistor of a surface channel type and a load which is connected to the output drive transistor. An input source follower amplifier has an input drive transistor and a load which is connected to the input drive transistor. A middle source follower amplifier unit is located between the input and the output source follower amplifiers and comprises a middle drive transistor of a buried channel type and a middle load which is connected to the middle drive transistor. The input source follower amplifier, the middle source follower amplifier unit, and the output source follower amplifier are connected in cascade to one another between the input and the output terminals.
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