Variable-Threshold Feedback Circuit for Consumable Chip Verification
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Solution Overview
Problem
Existing consumable chips for imaging devices face challenges in passing verification due to the need for specific feedback voltages, which are not adequately addressed by current technologies, leading to issues with counterfeit or defective components being identified and validated.
Innovation Solution
A consumable chip with a variable threshold feedback circuit that includes four feedback units connected in parallel, each with different transistor configurations, allowing the control unit to select and output various feedback voltages to match the verification requirements of the imaging device, using common MOS transistors for simplicity and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a consumable chip uses a fixed feedback voltage circuit, then the circuit structure is simple, but it cannot pass verification by imaging devices that require specific feedback voltages
Solution Approach 1:
The feedback circuit transitions from a fixed structure to a dynamic selectable structure. The control unit receives verification commands from the imaging device and dynamically selects which feedback unit to activate based on the required feedback voltage, enabling the circuit to adapt to different verification requirements while maintaining a relatively simple overall architecture.
Solution Approach 2:
The feedback circuit is divided into four independent feedback units, each configured to output a specific feedback voltage. This segmentation allows the control unit to select only the required feedback unit based on the verification command, avoiding the need to implement all possible feedback voltage generation circuits simultaneously, thus balancing adaptability with circuit complexity.
2Reliability
If the consumable chip implements multiple feedback voltage options, then it can pass more verification types, but the circuit complexity increases
Solution Approach 1:
The circuit uses dynamic selection controlled by the control unit to activate only the necessary feedback unit based on the verification command received from the imaging device. This approach ensures high reliability by providing multiple feedback voltage options while maintaining controlled complexity through selective activation rather than permanent implementation of all feedback paths.
Solution Approach 2:
The feedback circuit is designed as a multi-functional system where a single circuit structure can provide multiple feedback voltage outputs by selecting different feedback units. This universal design allows the same circuit to satisfy multiple verification requirements, improving reliability without proportionally increasing overall circuit complexity.
3Ease of manufacture
If common MOS transistors are used in feedback units, then manufacturing cost and simplicity improve, but precision in voltage output may be limited
Solution Approach 1:
The patent adjusts the width-to-length ratio parameters of the MOS transistors in each feedback unit to achieve different feedback voltage outputs. By carefully selecting these geometric parameters during design, the circuit can generate precise voltage levels using common, easily manufactured MOS transistors, thus balancing manufacturing simplicity with voltage output precision.
Data Source
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AI summary
The present invention relates to the technical field of printer consumables, in particular to a threshold variable feedback circuit, a consumable chip and a consumable. The feedback circuit comprises a control unit; a feedback module that comprises four different feedback units connected in parallel between the output terminal and the ground; each one of the feedback units comprises a gating component and feedback component that are connected in series between the output terminal and the ground; the control unit is electrically connected with the gating component of each one of the feedback units such that the feedback module selects and outputs an electrical signal of one of the feedback units to the output terminal. Selecting different feedback units can generate different feedback voltages to respond to the verification requirements of the imaging device, so that the consumable can pass the verification of the imaging device.