One-shot (monostable) timing dependencies — which change increases the output pulse width? Assume a standard one-shot whose width t is set by an external R * C network.

Introduction / Context:Monostable pulse width is primarily determined by the product R * C and, secondarily, by internal threshold fractions. Understanding which external parameter directly increases the width is essential in practical design and troubleshooting.

Given Data / Assumptions:

• One-shot with t ≈ K * R * C, where K is a device-dependent constant
• Supply-voltage dependence is weak over the rated range

Concept / Approach:If t is proportional to R * C, then increasing C (or R) increases t, while decreasing either decreases t. Changes to UTP or edges typically do not dominate compared to R and C selection for basic one-shots.

Step-by-Step Solution:

Verification / Alternative check:Datasheet curves generally show near-linear scaling of pulse width with timing capacitance across practical ranges.

Why Other Options Are Wrong:

• Supply voltage increases: often minimal effect on t within spec.
• Timing resistor decreases: reduces t.
• UTP decreases: threshold variations have smaller, device-specific effects.
• Faster trigger edge: affects triggering reliability, not width set by R and C.

Common Pitfalls:

• Overestimating supply sensitivity for timing; R and C dominate.

Final Answer:timing capacitance increases