Multiplexer Switch Circuit for Type-C Anti-Leakage Isolation
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Solution Overview
Problem
Existing switch circuits and multiplexers used in Type_C connectors lack anti-leakage and high-voltage durable mechanisms, making them prone to short-circuits and leakage due to incorrect pin connections and humidity, especially when designed without considering these issues.
Innovation Solution
A switch circuit comprising a switching device control circuit, Type-I and Type-II switch elements, and resistors with high resistance, where the conduction states of these elements determine the electrical connection between input and output terminals, providing a robust anti-leakage mechanism by controlling voltage levels and preventing leakage under various conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional multiplexer is used to support both-side insertion of Type_C connector, then the connector functionality is achieved, but leakage occurs and high-voltage durability is compromised
Solution Approach 1:
The multiplexer is divided into multiple independent switch circuits, each handling specific pin connections. This segmentation allows independent control of each switching element, enabling precise anti-leakage mechanisms to be applied to each segment without affecting others, thereby improving overall reliability under high-voltage conditions
Solution Approach 2:
The control circuit detects voltage levels on pins before establishing connections. When high voltage is detected on certain pins, the control circuit proactively configures switching elements to prevent leakage paths before they can cause harm. This preliminary action ensures high-voltage durability by preparing the circuit in advance for potential voltage conditions
Solution Approach 3:
The patent dynamically changes the conduction state parameters of switching elements based on detected voltage levels. When high voltage is present, switching elements are configured to block leakage paths; when low voltage is present, normal connection functionality is enabled. This parameter adaptation resolves the contradiction between maintaining connectivity and preventing leakage
2Reliability
If pins are incorrectly connected or humidity is present, then short-circuit risk increases, but the circuit should maintain high-voltage durability
Solution Approach 1:
The control circuit continuously monitors voltage levels on connector pins and uses this feedback to dynamically adjust the conduction states of switching elements. When incorrect connection or humidity-induced voltage changes are detected, the feedback mechanism reconfigures the circuit to prevent short-circuits while maintaining high-voltage durability through adaptive protection
Solution Approach 2:
The circuit applies preliminary protective measures by detecting voltage conditions that indicate incorrect pin connections or humidity presence. Before short-circuits can occur, the control circuit configures switching elements to block potential leakage paths, thereby preventing harmful effects while preserving high-voltage durability
3Object-generated harmful factors
If anti-leakage mechanisms are added to the multiplexer, then leakage prevention is improved, but device complexity increases
Solution Approach 1:
The control circuit performs multiple functions: it detects voltage levels, determines connection status, controls switching elements, and implements anti-leakage mechanisms all through a single integrated unit. This multi-functionality improves leakage prevention without proportionally increasing device complexity, as one control circuit handles all protective and control tasks
Solution Approach 2:
The patent combines the control logic for multiple switching elements into a single control circuit that manages all anti-leakage operations. By merging the control functions for different switch circuits into one unified controller, the system achieves comprehensive leakage prevention while minimizing the increase in overall device complexity through consolidation
Data Source
AI summary
A switch circuit includes: a switching device control circuit receiving a first voltage and a second voltage, a first Type-I switching device coupled to the switching device control circuit and a first control voltage, a first Type-II switch element coupled to the switch control circuit and the first Type-I switch element, and a second Type-II switch element coupled to the first Type-I switch element and the first Type-II switch element. When the second voltage is higher than the first voltage, the switch control circuit turns on the first Type-II switch element in order to turn off the second Type-II switch element; and when the second voltage is higher than the first voltage, the first Type-I switch element is off.