The first step in the RF amplifier design is to check if the transistor is unconditionally stable.
微波放大器设计中，首要考虑的问题是管子的稳定性。
A depleted NMOS transistor, which was used as current source, and a negative feedback loop constitute a stable voltage reference.
该电路采用耗尽型NMOS管作电流源器件，结合负反馈，实现了稳定的电压基准。
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