Optical Transceiver Pad Isolation for Hot-Plug Signal Stability
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Solution Overview
Problem
Existing optical transceivers face challenges in minimizing the impact of hot-plugging on serial communication during the insertion and removal of optical transceivers into host devices, leading to potential interference with ongoing serial communication signals.
Innovation Solution
The optical transceiver design incorporates a mechanism with switches and a specific electrical connector configuration that isolates signal pads from the internal circuit until full insertion, preventing unintended voltage application and ensuring stable activation processing by generating a switching signal upon power supply detection, thus reducing interference with serial communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrical connector uses a two-row structure where the first row is inserted first and the second row is inserted later, then the signal pads in the second row can be electrically connected to the apparatus before the internal circuit is fully activated, but this may cause unintended voltage application to signal pads during hot-plugging
Solution Approach 1:
The patent applies preliminary action by isolating the signal pads from the internal circuit during the hot-plugging process before full insertion is complete. The switching signal is generated after the second row of signal pads is electrically connected but before the internal circuit is fully activated, ensuring that no unintended voltage is applied to the signal pads during the transition period. This preliminary isolation action prevents harmful voltage application while maintaining reliable electrical connection sequencing.
Solution Approach 2:
The patent introduces a switching mechanism as an intermediary between the signal pads and the internal circuit. This switching mechanism is controlled by a switching signal that mediates the electrical connection state, allowing the signal pads to be physically connected to the apparatus while preventing electrical voltage application until the appropriate timing. The intermediary switching mechanism resolves the contradiction by decoupling physical connection from electrical activation.
2Ease of operation
If the optical transceiver allows hot-plugging operation, then ease of operation is improved, but interference with ongoing serial communication signals occurs during insertion and removal
Solution Approach 1:
The patent applies preliminary action by generating the switching signal at a precisely timed moment during the hot-plugging sequence - after the second row of signal pads is electrically connected but before normal operation begins. This timing ensures that the internal circuit is properly initialized and ready to handle communication signals, preventing interference with ongoing serial communication while maintaining hot-plugging ease of operation.
Solution Approach 2:
The patent applies preliminary anti-action by using the switching mechanism to prevent harmful interference before it can occur. The switching signal is generated in advance to ensure the internal circuit is properly activated and ready to handle communication signals, thereby preemptively preventing interference with ongoing serial communication during the hot-plugging process.
3Reliability
If the switching signal is generated after the first signal pad and second signal pad are electrically connected, then the internal circuit can be properly activated, but this delays the isolation of third and fourth signal pads from the internal circuit
Solution Approach 1:
The patent resolves this timing contradiction by applying preliminary action through a precisely sequenced switching mechanism. The switching signal is generated at the optimal moment - after the second row of signal pads is electrically connected, ensuring proper internal circuit activation. The switching mechanism then immediately isolates the third and fourth signal pads, minimizing the time window for potential interference while ensuring reliable circuit activation has occurred.
Data Source
AI summary
An optical transceiver includes an electrical connector, an internal circuit, first switch and second switch. The internal circuit is electrically connected to the apparatus through the electrical connector when the optical transceiver is completely inserted into the apparatus, and generate a switching signal after a first signal pad and a second signal pad in a second row of the electrical connector are electrically connected. The first switch isolates a third signal pad in a first row of the electrical connector when the optical transceiver is not fully inserted, and puts the third signal pad electrically connectable in accordance with the switching signal when the optical transceiver is fully inserted. The second switch isolates a fourth signal pad in the first row when the optical transceiver is not fully inserted, and puts the fourth signal pad electrically connectable in accordance with the switching signal when the optical transceiver is fully inserted.