Bidirectional Transceiver Auto-Direction Switching Without Control Pins
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Solution Overview
Problem
Existing bidirectional transceivers require direction control pins for data transmission and reception, which increases manufacturing costs and complexity, and can be channel-dependent, limiting independence in multi-channel systems.
Innovation Solution
The development of autosensing, autodirection changing bidirectional transceivers that automatically switch data transmission direction without the need for additional pins, utilizing driver sections and direction control circuits with logic gates and comparators to enable bidirectional data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If direction control pins are used to control transmit and receive directions, then the transceiver can perform bidirectional data transmission, but the manufacturing cost and device complexity increase
Solution Approach 1:
The patent removes the direction control pins from the transceiver design entirely. Instead of using external control pins to manage transmit/receive directions, the invention uses the data lines themselves to carry direction control information through encoding schemes, thereby extracting the problematic control pins while maintaining bidirectional functionality
Solution Approach 2:
The data lines are made to serve dual purposes: carrying both data information and direction control information. By encoding direction control signals within the data transmission medium itself, the same physical channels perform multiple functions, eliminating the need for dedicated control pins
2Adaptability or versatility
If direction control pins are used to manage transmit and receive directions, then the transceiver can switch between transmission and reception modes, but the software complexity increases
Solution Approach 1:
The transceiver system becomes self-managing regarding direction control. The encoding scheme automatically embeds direction information within the data stream, allowing the system to self-regulate transmit/receive modes without requiring complex external software intervention to manage direction pin states
3Adaptability or versatility
If direction control pins are used for each channel, then each channel can be controlled independently, but the manufacturing cost increases
Solution Approach 1:
The same data lines serve dual purposes of carrying both data and direction control signals across multiple channels. This multi-functional use of existing channels eliminates the need for additional control pins per channel, reducing manufacturing costs while preserving channel independence through the encoding mechanism
Data Source
AI summary
In accordance with an embodiment, a transceiver includes a bidirectional data transmission circuit coupled to a direction control circuit and method for transmitting electrical signals in one or more directions. The direction control circuit generates a comparison signal in response to comparing input/output signals of the bidirectional data transmission circuit. Transmission path enable signals are generated in response to the comparison signal.