Configurable Auto Retry Circuit with Impedance-Based Error Masking
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Solution Overview
Problem
Existing auto retry circuits cannot count the number of retries for circuit protection devices, leading to potential damage and inability to configure retry parameters post-production, and are affected by component-induced errors such as fabrication variability and capacitor tolerance variations.
Innovation Solution
A configurable auto retry system that includes a timer duration circuit, logic circuit, and output circuit to set and count retries based on impedance, allowing for adjustable retry delay and number of retries, and an error masking circuit to compensate for component-induced errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing auto retry circuits are used, then circuit protection is provided, but the number of retries cannot be counted and retry parameters cannot be configured post-production
Solution Approach 1:
The circuit is divided into separate functional modules: a retry counter module that counts retry operations, a parameter storage module that stores retry parameters (delay time, number of retries), and a control module that coordinates their operation. This segmentation enables independent configuration and counting functions that were previously integrated and non-configurable.
Solution Approach 2:
The circuit implements feedback mechanisms where the retry counter provides status information back to the control logic, and the configured parameters are fed back into the retry operation control. This feedback loop enables the circuit to track and respond to the number of retries performed, providing both counting capability and configurability.
2Ease of manufacture
If component-induced errors (fabrication variability, capacitor tolerance) are present, then manufacturing is simplified, but measurement precision of retry parameters deteriorates
Solution Approach 1:
The circuit compensates for component-induced errors by dynamically adjusting retry parameters based on actual measured values. Instead of relying on fixed nominal values, the system measures actual component characteristics and modifies the retry delay time and count values accordingly, thereby maintaining precision despite manufacturing variations.
Solution Approach 2:
The invention creates a digital model or representation of the actual component characteristics through measurement, and uses this copied information to compensate for deviations from nominal values. This allows the system to account for fabrication variability without requiring tighter manufacturing tolerances.
Data Source
AI summary
The present disclosure relates to configuring parameters of a system. In some examples, a timer duration circuit can be configured to output a timer duration signal defining a time duration for a retry signal based on an impedance of a first circuit coupled at a first node. A logic circuit can be configured to control an output of the retry signal to at least one integrator circuit to control a current to a second node based on one of the timer duration signal and a retry timer signal, and a combination thereof. An output circuit can be configured to output a stop retry signal based on a voltage established by a second circuit at the second node based on its impedance and the current. The stop retry signal can indicate a number of retries that have occurred and can be based on the capacitances of the first and second circuits.