Single-Wire Surgical Instrument Bus Bridging for Reliable Data
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Solution Overview
Problem
Ultrasonic surgical instruments face communication challenges due to nodes with single-wire communication capability operating in environments where differential media would provide more reliable communication, leading to inefficiencies in data transmission between components.
Innovation Solution
A single wire digital communication system that uses logic devices to detect dominant or passive states, separating these into transmit and receive channels, and employs differential transceiver operational amplifiers to convert signals into a differential bus, allowing multiple single-wire capable nodes to communicate on a single differential bus medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single-wire communication interface is used, then device complexity is reduced, but communication reliability deteriorates
Solution Approach 1:
The patent introduces a single-wire to differential bus converter as an intermediary device that bridges single-wire communication nodes and differential bus infrastructure. This converter includes a detector that monitors bus state and a controller that manages signal conversion, enabling single-wire devices to communicate reliably over differential media without requiring complex multi-wire interfaces at each node.
2Ease of operation
If single-wire communication is used, then ease of operation is improved, but loss of information increases
Solution Approach 1:
The converter acts as an intermediary that preserves data integrity by detecting dominant and passive states on the single-wire bus and accurately converting them to differential signals. The detector monitors voltage levels and state transitions, while the controller manages the conversion process to prevent data loss or corruption during transmission between single-wire nodes and the differential bus.
Solution Approach 2:
The system changes signal parameters by detecting voltage level transitions (dominant low state vs. passive high state) on the single-wire bus and converting them to differential voltage signals. This parameter transformation enables faithful reproduction of data while adapting to the different electrical characteristics of the differential bus medium.
3Device complexity
If single-wire communication is used, then device complexity is reduced, but productivity deteriorates
Solution Approach 1:
The converter enables single-wire nodes to access the high-speed differential bus infrastructure, achieving fast data transmission without requiring the nodes themselves to be complex. The intermediary handles the conversion overhead, allowing simple nodes to benefit from the productivity of differential communication.
Solution Approach 2:
The communication system is segmented into simple single-wire nodes and a converter infrastructure. This segmentation allows nodes to remain simple while the converter layer handles the complex conversion tasks, enabling efficient data transmission without increasing node complexity.
Data Source
AI summary
A single wire digital communication system for use with an ultrasonic surgical instrument and an ultrasonic surgical instrument including a single wire digital communication system. The single wire digital communication system includes first transmitter logic buffer and first receiver logic buffer operably coupled to a first single wire device via a first single wire communication bus. The single wire digital communication system also includes a first differential transceiver operational amplifier operably coupled to the first transmitter logic buffer via a first transmitter signal line and operably coupled to the first receiver logic buffer via a first receiver signal line. A second differential transceiver operational amplifier is operably coupled to the first differential transceiver operational amplifier via at least one differential bus. A second single wire device is operably coupled to the differential bus and configured to communicate with the first single wire device.