Differential Link Identification Using Common-Mode Voltage Encoding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing computer systems with multi-drop communication links face increased costs and complexity due to the use of hardware jumpers or switches for programming unique identifiers, and additional dedicated wires for sending identifiers from a central device.
Innovation Solution
Utilizing common mode operating voltages of differential signals to program identifiers for devices on multi-drop communication links, eliminating the need for hardware jumpers and dedicated wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hardware jumpers or switches are used for programming unique identifiers, then device identification capability is achieved, but manufacturing cost and device complexity increase
Solution Approach 1:
The patent extracts the identifier programming function from physical hardware components (jumpers/switches) and relocates it to the electrical signal domain. By using the common mode voltage of differential communication signals to carry identifier information, the solution eliminates the need for separate hardware programming components, thereby reducing device complexity and manufacturing cost while maintaining reliable device identification capability
Solution Approach 2:
The patent makes the differential communication link serve multiple functions: data transmission and identifier programming. The common mode voltage of the differential signals is utilized to encode device identifiers, allowing the same communication infrastructure to perform both data communication and device identification/programming tasks, thus eliminating dedicated hardware jumpers or switches
2Loss of information
If dedicated wires are used for sending identifiers from central device, then identifier transmission is achieved, but wiring overhead and system complexity increase
Solution Approach 1:
The patent enables the existing differential communication links to perform dual functions: data transmission and identifier transmission. By encoding identifier information in the common mode voltage of the differential signals already present on the communication links, the solution eliminates the need for separate dedicated wires for identifier transmission, thereby reducing wiring overhead while ensuring complete identifier transmission
Solution Approach 2:
The patent merges the identifier transmission function with the data transmission function by using the same physical communication links. The common mode voltage component of the differential signals is utilized to carry identifier information alongside the differential signal data, combining multiple information channels into a single communication infrastructure
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces manufacturing costs and complexity by enabling efficient programming of unique identifiers using common mode voltages, thereby simplifying the communication interface design.
Implementation Method 1
The central device may be configured to send a first identifier to a first peripheral device using a first common mode voltage on a first point-to-point communication link
Implementation Method 2
send a first identifier to a first peripheral device using a first common mode voltage on a first point-to-point communication link
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A computer system that allows a central device to transmit identification information to multiple peripheral devices is disclosed. The central device is coupled to multiple peripheral devices via respective point-to-point communication links. The central device may send a first identifier to a particular peripheral device of the multiple peripheral devices using a particular common mode voltage on a particular point-to-point communication link that is coupled between the central device and the particular peripheral device.