Glitch Rejection Inverter Chain With Adaptive Threshold Control
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Solution Overview
Problem
Existing signal generation systems in electronic devices face challenges in effectively rejecting glitches or noise, which can lead to erroneous outputs and spontaneous errors in digital systems.
Innovation Solution
A signal generation apparatus is designed with a glitch rejection circuit comprising n m-stage inverters coupled in series, a level detection circuit, and a voltage signal generation circuit. The glitch rejection circuit adjusts switching threshold voltages based on voltage signals to generate a glitch-removed output signal when a glitch occurs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a glitch rejection circuit with m-stage inverters is used to reject noise, then the reliability of digital systems is improved, but the device complexity increases
Solution Approach 1:
The glitch rejection circuit is divided into multiple m-stage inverter blocks coupled in series, where each block independently processes and filters glitch components from the input signal. This segmentation allows the system to achieve reliable noise rejection through cumulative filtering effect while maintaining modular structure that simplifies analysis and design.
Solution Approach 2:
The switching threshold voltages of the inverters are dynamically adjusted based on the plurality of voltage signals generated by the voltage signal generation circuit. This dynamic adjustment allows the circuit to adaptively optimize its glitch rejection capability for different input signal conditions, improving reliability without requiring a fixed complex structure for all possible scenarios.
2Productivity
If switching threshold voltages are increased to reduce glitch pulse width, then the productivity is improved, but the use of energy increases
Solution Approach 1:
The voltage signal generation circuit generates periodic voltage signals that rhythmically adjust the switching threshold voltages of the inverters. This periodic adjustment allows the circuit to achieve high signal processing speed during critical periods when glitch rejection is most needed, while reducing energy consumption during periods when the signal is stable and less processing is required.
Solution Approach 2:
The switching threshold voltages are changed as a controllable parameter through the application of different voltage signals. By dynamically changing this parameter based on input signal conditions, the circuit optimizes the balance between processing speed and energy consumption, adjusting the threshold only when necessary to reject glitches rather than maintaining high thresholds continuously.
Data Source
AI summary
A signal generation apparatus includes a glitch rejection circuit including n m-stage inverters coupled in series, and configured to receive an input signal and perform an inverting operation on the input signal, based on a plurality of voltage signals, to generate an output signal and adjust switching threshold voltages of the m-stage inverters, based on the plurality of voltage signals, to generate the glitch-removed output signal, when a glitch occurs in the input signal, a level detection circuit to detect a logic level of the output signal provided from the glitch rejection circuit to generate a level detection signal and a complementary level detection signal, and a voltage signal generation circuit configured to receive the input signal, a complementary input signal, the level detection signal, and the complementary level detection signal to generate the plurality of voltage signals and provide the plurality of voltage signals to the glitch rejection circuit.