Pulse Width Control Circuit for Stable Narrow-Pulse Output

The delay unit is divided into multiple sub-delay units (first delay unit, second delay unit, third delay unit) that can be independently controlled. Each sub-delay unit contributes a portion of the total delay, allowing precise control of the overall delay amount while reducing the impact of PVT variations on any single unit. This segmentation enables the circuit to achieve the required pulse width extension without demanding excessive precision from individual delay elements.

The delay unit is configured to apply delay to the input pulse signal in advance, extending the pulse width before the signal is used by other circuits. By performing this pulse width extension proactively within the pulse signal generation circuit, the circuit ensures that downstream circuits receive adequately wide pulses even when the system operates at high speeds with narrow clock periods. This preliminary action prevents reliability issues that would otherwise arise from excessively narrow pulse widths.

The delay amount is made adjustable through control signals that can dynamically configure the delay unit's behavior. The delay unit responds to control signals (such as SEL signals) to adjust its delay characteristics, allowing the circuit to adapt to different operating conditions without requiring a fixed, overly complex inverter chain design. This dynamic control simplifies the overall device complexity while maintaining the ability to achieve precise delay amounts when needed.