Minimum Pulse-Width Assurance Circuit for Signal Integrity
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Solution Overview
Problem
Electronic systems face issues with missed pulses due to pulse widths being too short, leading to accuracy and power efficiency degradation, and potentially causing circuits to enter undesirable states, with current solutions either resulting in inefficiency or limiting pulse frequency.
Innovation Solution
A minimum pulse-width assurance circuit comprising logic circuits, one-shot circuits, and a minimum pulse-width filter, which ensures that pulses maintain a minimum width by extending narrow pulses and filtering out glitches, using feedback paths and one-shot circuits to control pulse widths for both rising and falling edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the pulse width is reduced to increase pulse frequency, then productivity is improved, but reliability deteriorates due to missed pulses
Solution Approach 1:
The patent applies preliminary action by extending the pulse width before it reaches downstream circuits through a pulse extension circuit. This circuit detects narrow pulses and extends them to a minimum required width, ensuring that pulses are sufficiently wide to be reliably detected by downstream circuits while still maintaining high pulse frequency. The extension happens in advance, preventing missed pulses without limiting the overall pulse rate.
2Reliability
If a margin of error is built into the design to prevent missed pulses, then reliability is improved, but productivity deteriorates due to limited pulse frequency
Solution Approach 1:
The patent applies dynamics by implementing an adaptive pulse extension mechanism that dynamically adjusts pulse width based on actual pulse characteristics. The circuit monitors incoming pulses and selectively extends only those that fall below the minimum width threshold, while leaving adequately wide pulses unchanged. This dynamic approach ensures reliable pulse detection without unnecessarily limiting pulse frequency, as the system adapts to each pulse's actual width rather than applying a fixed conservative margin.
3Productivity
If multiple pulses are allowed per period to improve efficiency, then productivity is improved, but stability deteriorates due to potential unstable states
Solution Approach 1:
The patent applies feedback by implementing a control mechanism that monitors the system state and regulates pulse generation accordingly. The feedback circuit detects when allowing multiple pulses per period could drive the system into an unstable state and prevents such conditions. This enables the system to efficiently process multiple pulses when safe, while automatically reducing to single-pulse operation when stability risks are detected, thus achieving high productivity without compromising circuit stability.
Data Source
AI summary
Various methods and devices that involve pulsed signals are disclosed. An example minimum pulse-width (MPW) circuit comprises a first and second logic circuit. A first input of the first logic circuit is connected to an input of the MPW circuit. A first input of the second logic circuit is communicatively coupled to an output of the first logic circuit. The MPW circuit also comprises a MPW filter circuit communicatively coupled to an output of the second logic circuit, a one-shot circuit communicatively coupled to an output of the minimum pulse-width filter circuit and located on a first feedback path, and another one-shot circuit communicatively coupled to the output of the minimum pulse-width filter circuit and located on a second feedback path. A second input of the first logic circuit is on the first feedback path. A second input of the second logic circuit is on the second feedback path.