Parameter Monitoring Circuit Using Offset Codes for Error Detection
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Solution Overview
Problem
Existing parameter monitoring, duty cycle correction, and impedance calibration circuits require separate monitoring devices to detect errors, which increases complexity and hardware resource usage.
Innovation Solution
A parameter monitoring circuit, duty cycle correction circuit, and impedance calibration circuit that utilize code generation, adjustment, and comparison mechanisms to detect errors without a separate monitoring device, using offset codes to generate and compare parameters and clock signals, thereby identifying errors within the circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate monitoring device is used to detect parameter errors, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent merges the parameter error detection function into the existing parameter adjustment circuit by utilizing the same code generation and comparison resources. The code generation circuit generates both adjustment codes and monitoring codes, and the comparison circuit performs both parameter adjustment and error detection, eliminating the need for separate monitoring devices while maintaining detection accuracy.
Solution Approach 2:
The comparison circuit is designed to perform multiple functions: it compares parameters for adjustment purposes and simultaneously compares parameters for error detection purposes. This multi-functional design allows the same hardware resources to serve both parameter optimization and error monitoring needs, reducing overall system complexity.
2Reliability
If a separate monitoring device is used to detect parameter errors, then reliability is improved, but device complexity increases
Solution Approach 1:
The error detection function is merged with the parameter adjustment function by using the same code generation and comparison infrastructure. The code generation circuit produces codes for both adjustment and monitoring, and the comparison circuit handles both functions, ensuring reliable error detection without adding separate monitoring hardware.
Solution Approach 2:
The parameter adjustment circuit performs self-monitoring by using its own internal resources (code generation circuit and comparison circuit) to detect errors in its operation. This self-service approach eliminates the need for external monitoring devices while maintaining reliable error detection capability.
3Measurement precision
If offset codes are applied to generate multiple parameters for comparison, then error detection precision is improved, but manufacturing precision requirements increase
Solution Approach 1:
Offset codes are applied in advance to generate multiple parameter versions before comparison. This preliminary action creates predetermined parameter variations that facilitate error detection, allowing the system to detect errors by comparing these pre-adjusted parameters against the actual parameter values.
Solution Approach 2:
The system intentionally changes parameter values by applying offset codes to create multiple parameter versions for comparison. This parameter transformation approach enables error detection by observing how parameter variations affect the system output, improving detection precision without requiring extreme manufacturing precision.
Data Source
AI summary
A parameter monitoring circuit includes a code generation circuit configured to generate a first code, to which a first offset is applied, and a second code, to which a second offset is applied; a parameter adjustment circuit configured to generate a first parameter and a second parameter by respectively applying the first code and the second code to a current parameter; a comparator circuit configured to generate a first comparison result and a second comparison result, the first comparison result indicating a comparison result between the first parameter and a reference parameter value, and the second comparison result indicating a comparison result between the second parameter and the reference parameter value; and a parameter error detection circuit configured to detect an error in the current parameter, based on the first comparison result and the second comparison result.