Low-Voltage Drive Circuit Using Multi-Frequency Bus Signaling
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Solution Overview
Problem
Current data communication systems face challenges in efficiently transmitting digital data over low voltage signals with minimal power consumption and high noise immunity, particularly in environments where data errors are prevalent.
Innovation Solution
The implementation of Low Voltage Drive Circuits (LVDCs) that convert digital data into analog signals with oscillating components at specific frequencies, allowing for low power transmission and reception with improved noise immunity, and enabling multiple frequency channels for increased data rates without significant power increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital data is transmitted using conventional voltage levels, then data communication is achieved, but power consumption increases and noise immunity decreases
Solution Approach 1:
The patent changes the voltage level parameter from conventional high voltage levels to low voltage levels (e.g., 0.8V to 3.3V ranges). The LVDC modulates digital data onto carrier signals at these reduced voltage levels, achieving both low power consumption and improved noise immunity through frequency-based modulation rather than voltage-based representation.
Solution Approach 2:
The patent replaces the conventional mechanical/electrical system of direct voltage-level data representation with a signal processing approach using modulation. Digital data is modulated onto analog carrier signals, substituting the direct voltage-state system with a frequency-domain representation that is inherently more noise-resistant and power-efficient.
2Reliability
If data transmission power is increased to improve signal quality, then noise immunity improves, but power consumption increases significantly
Solution Approach 1:
The patent changes the fundamental parameter from voltage amplitude to frequency modulation. By modulating data onto carrier signals with frequencies in specific ranges (e.g., 100Hz to 100MHz), the system achieves high signal quality through frequency discrimination rather than voltage amplitude, maintaining low transmission power while improving noise immunity.
Solution Approach 2:
The patent introduces carrier signals as intermediary elements between the digital data and the transmission medium. These carrier signals act as mediators that carry the modulated data at low power levels while being inherently resistant to noise, eliminating the need for high transmission power to achieve signal quality.
3Productivity
If multiple frequency channels are used to increase data rates, then productivity increases, but device complexity increases
Solution Approach 1:
The patent segments the frequency spectrum into multiple channels (e.g., first frequency range for data, second frequency range for clock signals). Each frequency channel can independently carry data, enabling parallel transmission and increased data rates. The segmentation of frequency resources allows efficient multiplexing without requiring complex time-division or code-division mechanisms.
Solution Approach 2:
The LVDC is designed with multi-functionality to handle multiple frequency channels simultaneously. A single LVDC can modulate and transmit data on multiple frequency carriers, and the receiving LVDC can demodulate multiple channels, providing universal data communication capability across different frequency ranges without requiring separate dedicated circuits for each channel.
Data Source
AI summary
A low voltage drive circuit includes a transmit digital to analog circuit that converts transmit digital data into analog outbound data by: generating a DC component; a first plurality of oscillations, wherein each oscillation of the first plurality of oscillations has first unique oscillation characteristics; selecting one of the first plurality of oscillations in accordance with a first portion of the transmit digital data to produce a first selected oscillation; generating a second plurality of oscillations, wherein each oscillation of the second plurality of oscillations has second unique oscillation characteristics; selecting one of the second plurality of oscillations in accordance with a second portion of the transmit digital data to produce a second selected oscillation, and outputting the first selected oscillation and the second selected oscillation on an n-bit-by-n-bit basis to produce an oscillating component, wherein the DC component is combined with the oscillating component to produce the analog outbound data. A drive sense circuit drives an 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 in a first frequency range and wherein analog inbound data is represented within an analog receive signal as variances in loading of the bus in a second frequency range.