Logic State Detection Circuit With Threshold Voltage Correction
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Solution Overview
Problem
Detection circuits in logic or mixed signal circuits often inaccurately determine the logic state of input signals due to manufacturing fluctuations or improper design, leading to incorrect identification of high or low logic states.
Innovation Solution
A circuit comprising a detection circuit, a correction circuit, and an adjustment circuit that compares the initial logic state with a second signal to generate an enable signal, allowing the adjustment circuit to modify the transition voltage of the detection circuit, ensuring accurate logic state determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a detection circuit is used to determine logic state of input signal, then the logic state detection function is provided, but errors occur due to manufacturing process fluctuation or improper circuit design causing incorrect logic state determination
Solution Approach 1:
The patent implements a feedback mechanism where the detection circuit's output is fed back through a correction circuit that compares the detected logic state with the expected logic state. When a mismatch is detected, the correction circuit generates a correction signal that adjusts the detection circuit's threshold voltage, thereby correcting the detection error and improving reliability without sacrificing detection precision.
Solution Approach 2:
The patent dynamically changes the threshold voltage parameter of the detection circuit based on detected errors. By adjusting this critical parameter, the system adapts to manufacturing variations and design imperfections, resolving the contradiction between reliability and measurement precision in logic state detection.
2Measurement precision
If the detection circuit is adjusted to improve accuracy, then logic state determination precision improves, but the circuit complexity increases due to additional correction and adjustment circuits
Solution Approach 1:
The patent introduces a correction circuit as an intermediary component between the detection circuit and the rest of the system. This mediator compares the detection output with expected values and generates correction signals, achieving improved precision while containing complexity growth by using a modular intermediary structure rather than redesigning the entire detection system.
Solution Approach 2:
The patent divides the detection system into separate functional modules: the original detection circuit, a correction circuit for error detection, and an adjustment circuit for threshold modification. This segmentation allows each module to perform its specific function independently, improving overall precision while making the complexity manageable through modular design.
3Reliability
If correction circuit and adjustment circuit are added to correct logic state errors, then detection accuracy improves, but the device complexity and number of components increase
Solution Approach 1:
The patent merges the correction and adjustment functions into an integrated correction circuit that performs both error detection and threshold adjustment operations. By combining these functions into a single unified circuit rather than separate components, the system achieves improved reliability while minimizing the increase in device complexity and component count.
Data Source
AI summary
The present disclosure provides a circuit. The circuit includes a detection circuit, a correction circuit and an adjustment circuit. The detection circuit is configured to detect an initial logic state of an input signal, and to generate, in response to the initial logic state, a first signal with a first logic state. The correction circuit is configured to compare the first signal having the first logic state with a second signal having a second logic state, and to generate an enable signal according to the comparison. The adjustment circuit is configured to be enabled by the enable signal when the first logic state of the first signal is different from the second logic state of the second signal, to generate an adjustment signal to the detection circuit, in which the detection circuit is further configured to be adjusted according to the adjustment signal, to generate an adjusted first signal.