Margin Gate Three-Row Scan - Electronic Circuits IX: Feedback Control and Stability Margins Step by Step

The strict stability gate is visible at zero, one, and two correction. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

Zero correction fails the strict lower gate

The strict gate is 0 less than c less than 2. Correction 0 fails because it does not move.

0<c<2,\quad c=0\Rightarrow \text{fail}

One correction passes inside the gate

Correction 1 is inside the gate, so the model label is pass.

0<1<2\Rightarrow \text{pass}

Two correction fails the strict upper gate

Correction 2 reaches the upper boundary, so the strict gate fails.

0<c<2,\quad c=2\Rightarrow \text{fail}