Single-Wire Bus Protocol Converter for Power Efficiency
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Solution Overview
Problem
In single-wire bus communication systems, power supply to slave circuits is not optimal as the bus is only capable of providing power for half of the transmission time, limiting efficiency and requiring additional power storage in slave circuits.
Innovation Solution
A protocol converter system that automatically adapts communication protocols between master and slave circuits, allowing for efficient power transfer by converting between two different bit-state coding protocols, one optimizing power transfer and the other prioritizing data transmission, using a multiplexer and conversion stages to manage signal states and power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the bus is pulled to ground to code transmitted data in a single-wire bus protocol, then data transmission is enabled, but the bus is only capable of providing power supply for half of the transmission time
Solution Approach 1:
The patent applies dynamics by making the communication protocol adaptable between two modes: a first protocol for slave circuits with autonomous power supply and a second protocol for slave circuits powered by the bus. The protocol converter dynamically switches between these protocols based on the slave circuit's power source, optimizing both power supply efficiency and transmission efficiency for different operating conditions
Solution Approach 2:
The patent changes the protocol parameters by modifying the bit state coding scheme. In the first protocol, bits are coded by time periods of fixed levels, while in the second protocol, the coding is adapted to optimize power transfer. This parameter change allows the same physical bus to serve different power supply requirements of slave circuits
2Loss of energy
If a protocol converter is introduced to adapt communication protocols, then power supply optimization is achieved, but device complexity increases
Solution Approach 1:
The patent introduces a protocol converter as an intermediary component between the master circuit and the slave circuit. This converter automatically adapts the communication protocol based on the slave circuit's power source, mediating between the master and slave to optimize power consumption while managing the complexity through automated protocol selection
Solution Approach 2:
The protocol converter operates autonomously by detecting the slave circuit's power source configuration and automatically selecting the appropriate protocol without external intervention. This self-service capability reduces the need for complex external control while optimizing power consumption based on the actual operating conditions
Data Source
AI summary
A method of transmission-reception over a serial bus placed, when idle, in a first state at a first voltage, including: a transmit circuit capable of coding a transmission according to a first protocol in which the respective states of the bits are conditioned by time periods of fixed levels, indifferently in the first state or in a second state at a second voltage smaller than the first one; a receive circuit capable of interpreting a communication according to the first protocol; and a protocol converter, interposed between the bus and the transmit and receive circuits, to convert the signals to be transmitted to a second protocol in which the respective states of the bits are conditioned by respective time periods of fixed levels in the first state, and to convert the received signals from the second protocol to the first protocol.