Multiplex High-Speed Signal Driver for D-PHY and C-PHY Switching
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Solution Overview
Problem
Conventional drive circuits for D-PHY and C-PHY interfaces are independent, leading to increased costs and a need for a cost-effective solution that can function as both D-PHY and C-PHY high-speed drive circuits.
Innovation Solution
A high-speed signal drive circuit is designed with a D-PHY drive signal generation module, a C-PHY drive signal generation module, a drive signal selection module, and a multiplex drive module, where the output terminals of these modules are connected to allow the multiplex drive module to function as either a D-PHY or C-PHY drive circuit by controlling switches based on the received signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate D-PHY and C-PHY drive circuits are used, then each interface can function independently, but the overall device complexity and cost increase
Solution Approach 1:
The multiplex drive module is designed to perform both D-PHY and C-PHY drive functions using the same physical circuit structure. By configuring control switches to connect different signal generation modules to the multiplex drive module, a single circuit achieves dual interface functionality, eliminating the need for separate dedicated circuits for each interface standard.
Solution Approach 2:
The patent combines the D-PHY drive circuit and C-PHY drive circuit into a unified multiplexed structure. The signal generation modules for both interfaces are merged into a single system that shares common drive circuitry, control logic, and output stages, reducing overall circuit complexity while maintaining both interface capabilities.
2Ease of manufacture
If a multiplex circuit is used to combine D-PHY and C-PHY drive circuits, then cost is reduced, but the device complexity increases
Solution Approach 1:
The multiplex drive module employs dynamically controllable switches that can be programmed to configure the circuit for either D-PHY or C-PHY operation. This dynamic reconfigurability allows a single static circuit structure to adapt its behavior based on control signals, achieving cost reduction through component sharing while managing complexity through software/firmware control rather than hardware complexity.
Solution Approach 2:
The invention changes the operational parameters of the multiplex drive module by adjusting switch configurations and control signal timings to accommodate different interface requirements. By modifying control parameters rather than hardware structure, the system achieves multi-functionality without permanently increasing physical circuit complexity.
Data Source
AI summary
A high speed signal drive circuit includes a D-PHY drive signal generation module, a C-PHY drive signal generation module, a drive signal selection module and a multiplex drive module. An output terminal of the D-PHY drive signal generation module and an output terminal of the C-PHY drive signal generation module are both connected to an input terminal of the drive signal selection module. An output terminal of the drive signal selection module is connected to an input terminal of the multiplex drive module. The drive signal selection module controls control switches of the multiplex drive module to be on and off based on a D-PHY drive signal or a C-PHY drive signal, so that the multiplex drive module functions as a D-PHY drive circuit or a C-PHY drive circuit. Thus, dual functions of the D-PHY drive circuit and the C-PHY drive circuit can be realized.