Low-Voltage Bus Drive Circuit Using Frequency-Encoded Loading
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Solution Overview
Problem
Current data communication systems face challenges in efficiently transmitting digital data over a common bus with low power consumption and high noise immunity, particularly in environments where data errors are prevalent, such as wireless communications.
Innovation Solution
The implementation of Low Voltage Drive Circuits (LVDCs) that convert digital data into analog signals with oscillating components of low magnitude, allowing for low power, high data rate communications with improved noise immunity, and enable full duplex or half duplex data transmission using multiple frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital data is transmitted using conventional voltage levels (90% of positive rail for logic 1, 10% of negative rail for logic 0), then data communication reliability is improved, but power consumption increases and noise immunity decreases
Solution Approach 1:
The patent changes the voltage parameter from conventional high-voltage digital levels to low-voltage analog levels with oscillating components. The LVDC transmits data using analog voltage levels between 0.1V and 1.5V with oscillating components at specific frequencies, rather than conventional 90%/10% rail voltage levels. This parameter change reduces power consumption while maintaining data integrity through frequency-based encoding and noise filtering techniques.
2Reliability
If digital data is transmitted using conventional voltage levels, then data communication is achieved, but noise immunity decreases in environments with prevalent data errors
Solution Approach 1:
The patent uses oscillating voltage components at specific frequencies to encode and transmit data. The LVDC generates analog signals with oscillating components that represent digital data through frequency modulation. This vibrational approach to signal transmission enhances noise immunity because the receiving end can filter and detect specific frequency patterns, making the communication more resilient to environmental noise and data errors.
3Use of energy by moving object
If Low Voltage Drive Circuits transmit data using analog signals with oscillating components, then power consumption is reduced and noise immunity is improved, but device complexity increases
Solution Approach 1:
The LVDC is designed as a multi-functional circuit that can both transmit and receive data bidirectionally through the same bus. The circuit can operate in different modes (full duplex or half duplex) and handles both analog signal generation and digital data processing within a single integrated device. This universality reduces the need for separate dedicated circuits for transmission and reception, thereby limiting the increase in overall device complexity while achieving low power consumption and improved noise immunity.
4Productivity
If multiple frequencies are used for full duplex or half duplex data transmission, then data rate per bus line increases, but device complexity increases
Solution Approach 1:
The patent employs periodic oscillating signals at different frequencies to encode and transmit multiple data streams simultaneously. The LVDC generates analog signals with oscillating components at specific frequencies, where each frequency can carry separate data channels. This periodic action enables full duplex or half duplex communication modes, increasing the effective data rate per bus line by utilizing frequency division multiplexing techniques within the low-voltage analog domain.
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 by: generating a DC component; and generating an oscillating component at a first frequency that conveys the transmit digital data, wherein the magnitudes of both the oscillating component and the DC component are limited to a range that is less than a difference between the magnitudes of the power supply rails of the circuit, and wherein the oscillating component and the DC component are combined 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 at a first frequency and wherein analog inbound data is represented within an analog receive signal as variances in loading of the bus at a second frequency.