Bus-Isolated Low-Voltage Drive Circuit for Full-Duplex Data Links
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Solution Overview
Problem
Current data communication systems face challenges in efficiently transmitting data over a common bus with low power consumption and high noise immunity, particularly in wireless communications where data errors are prevalent and power usage is a concern.
Innovation Solution
The implementation of Low Voltage Drive Circuits (LVDCs) that convert digital data into analog signals with a low magnitude oscillating component, allowing for low power, high data rate communications with good noise immunity, and enable full duplex or half duplex communication using multiple frequencies to increase data rates without significant power increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If digital data is transmitted directly via wire or metal trace, then data communication is achieved, but power consumption increases and noise immunity decreases
Solution Approach 1:
The patent replaces direct digital voltage switching (mechanical/electrical system) with analog carrier wave modulation. Instead of transmitting digital signals directly through wires, the system modulates analog carrier waves with digital data, enabling transmission over longer distances with better noise immunity while maintaining low power consumption through efficient modulation techniques.
Solution Approach 2:
The patent changes the transmission parameter from direct digital voltage levels to modulated analog carrier wave parameters (amplitude, frequency, or phase). This parameter transformation allows the system to achieve both low power consumption and high noise immunity by encoding digital data in the modulation characteristics of analog carriers rather than direct voltage switching.
2Productivity
If multiple frequencies are used for full duplex communication, then data rate increases, but device complexity increases
Solution Approach 1:
The patent segments the communication channel into multiple frequency bands, with different carrier frequencies allocated for upstream and downstream communication. This frequency segmentation enables full duplex operation where data can be transmitted in both directions simultaneously without interference, achieving high data rates while managing complexity through structured frequency allocation.
Solution Approach 2:
The patent adds the frequency dimension to the communication system, transitioning from single-frequency half-duplex communication to multi-frequency full-duplex communication. By utilizing the frequency domain as an additional dimension, the system achieves simultaneous bidirectional data transmission, effectively doubling the data rate capability without proportionally increasing device complexity.
Data Source
AI summary
A low voltage drive circuit includes a transmit analog to digital circuit that converts transmit digital data into analog outbound data. A receive analog to digital circuit converts analog inbound data into received digital data. A drive sense circuit is configured to: convert the analog outbound data into an analog transmit signal; drive the analog transmit signal onto a bus, wherein the analog outbound data is represented within the analog transmit signal as variances in loading of the bus at a first frequency; receive an analog receive signal from the bus; and isolate the analog receive signal from the analog transmit signal to recover the analog inbound data, wherein the analog inbound data is represented within the analog receive signal as variances in loading of the bus at a second frequency.