Differential Serial Interface for Multi-Standard Video Transceivers
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Solution Overview
Problem
Current video interface transceivers are limited to supporting only one or two video interface standards, requiring multiple physical ports and complex user management for different standards, leading to increased device size and connection complexity.
Innovation Solution
A direction-selectable differential high-speed serial interface with a shared transmitter and receiver that uses an active capacitor multiplying circuit to support multiple video protocols such as DisplayPort, DVI, HDMI, and PCIe, allowing for a single transceiver to handle various standards through a common physical layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple physical ports are used to support different video interface standards, then compatibility with various standards is improved, but device physical area and connection complexity increase
Solution Approach 1:
The patent implements a universal transceiver design where a single physical port and transceiver circuit can operate across multiple video interface standards (LVDS, DisplayPort, DVI, HDMI) by dynamically reconfiguring the interface parameters. The transceiver is designed to handle different data rates, encoding schemes, and protocol requirements through software-controlled configuration, eliminating the need for separate dedicated ports for each standard.
2Adaptability or versatility
If multiple physical ports are used to support different video interface standards, then compatibility with various standards is improved, but device complexity and user management burden increase
Solution Approach 1:
The system presents a unified single physical port interface to users while internally supporting multiple video standards. The transceiver automatically detects or is configured for the appropriate standard, and the system software manages protocol-specific settings, shielding users from the complexity of multiple different connection types and management procedures.
Solution Approach 2:
The patent introduces a layer of abstraction between the physical port and the various video protocols. A controller or management system acts as an intermediary, handling protocol-specific configurations, signal conditioning, and interface adjustments, allowing the single physical port to adapt to different standards without exposing users to the underlying complexity.
3Reliability
If separate transmitter and receiver paths are used in high-frequency transceivers, then transmission performance is improved, but physical area and device complexity increase
Solution Approach 1:
The patent merges the transmitter and receiver functions into a single integrated transceiver block that shares common physical infrastructure including solder bumps, package substrates, and bonding wires. The differential signal pairs serve dual purposes for both transmission and reception, and the transceiver circuitry is designed to operate in full-duplex mode, effectively combining separate functions into a unified architecture that reduces overall device area while maintaining high-frequency performance.
Data Source
AI summary
An active capacitor multiplying circuit that in one embodiment comprises (i) a clock synthesis loop filter of at least second order comprising a series combination of a first resistor and a first capacitor, wherein the series combination is coupled between a first charge pump interface and ground, wherein the clock synthesis loop filter further comprises a second capacitor coupled between the first charge pump interface and the ground; (ii) a capacitor multiplying loop filter comprising a second capacitor coupled between a second charge pump interface and the ground, wherein the capacitor multiplying loop filter further comprises a second resistor coupled to the second charge pump interface and the second charge pump interface is coupled to the first charge pump interface; and (iii) an operational amplifier, driven by the first capacitor, for driving the second resistor, wherein a voltage presented at the first charge pump interface drives a voltage controlled oscillator.