The oscillator gain must be unity (Aβ = 1∠–180°) at the oscillation frequency. Under normal
conditions, the circuit becomes stable when the gain exceeds unity, and oscillations cease.
However, when the gain exceeds unity with a phase shift of –180°, the nonlinearity of the active
device reduces the gain to unity and the circuit oscillates
我的疑惑是在unity如何解释
我自己理解如下：
在震荡频率下振荡器增益必须在 unity？ Aβ = 1∠–180°，正常情况下，增益超过unity，电路稳定，震荡停止
然后，当增益超过了unity并且相移-180度，非线性元件减少增益到unity，电路震荡。。。
不知道unity如何去理解，谢谢。 |
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