Held Value Feeds Threshold - Electronic Circuits V & VI: Front-End Conditioning and Op-Amp Feedback Step by Step

A held voltage can drive the next threshold stage, turning the stored analog value into a HIGH or LOW decision. The 4 V and 3 V comparison is exact for this ideal threshold model; real decisions need noise margin, input offset, hysteresis, timing, droop, and measured voltage uncertainty.

The next stage reads the held voltage, not the later input. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

The held value is the next input

The held output is 4 volts, so the next stage sees that value.

V_{\text{next}} = 4\ \text{V}

The held value crosses the upper threshold

The held value of 4 volts is above the upper threshold of 3 volts.

4\ \text{V} \ge 3\ \text{V}\Rightarrow \text{HIGH}