Parameter Monitoring Circuit Using Offset-Code 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 combines the parameter monitoring function with the existing parameter adjustment circuit by reusing its components (code generation circuit, parameter adjustment circuit, comparator circuit). The code generation circuit generates both adjustment codes and monitoring codes, and the comparator circuit performs both adjustment and monitoring comparisons, eliminating the need for a separate monitoring device while maintaining error detection capability
Solution Approach 2:
The existing circuit components are made multi-functional: the code generation circuit generates codes for both parameter adjustment and error monitoring, the parameter adjustment circuit adjusts parameters and monitors errors, and the comparator circuit compares parameters for both adjustment and monitoring purposes. This universal usage of components reduces device complexity while preserving measurement precision
2Reliability
If a separate monitoring device is used to detect parameter errors, then reliability is improved, but loss of substance increases
Solution Approach 1:
The monitoring function is merged into the existing parameter adjustment circuit, allowing the same hardware resources (code generation circuit, parameter adjustment circuit, comparator circuit) to serve dual purposes of parameter adjustment and error detection, thereby maintaining reliability while reducing hardware resource consumption
Solution Approach 2:
The parameter adjustment circuit performs self-monitoring by using its own components to detect parameter errors. The code generation circuit generates monitoring codes, the parameter adjustment circuit applies them, and the comparator circuit compares the results, enabling the circuit to monitor itself without external monitoring devices, thus reducing hardware resource usage while maintaining error detection reliability
Data Source
AI summary
A method of operating a system including a parameter monitoring circuit and a host, includes generating a first parameter applying a first code to a current parameter, wherein a first offset is applied to the first code; generating a first comparison result by comparing the first parameter with a reference parameter value; generating a second parameter applying a second code to the current parameter, wherein a second offset is applied to the second code; generating a second comparison result by comparing the second parameter with the reference parameter value; detecting an error in the current parameter, based on the first comparison result and the second comparison result; and providing a signal based on the error to the host.