Inductive Transformer Data Transmission Envelope Curve
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Solution Overview
Problem
Existing data transmission methods using coreless transformers are vulnerable to disturbance signals due to electromagnetic interference, and they consume high power for error correction, while the rise time of signals is limited by the winding parameters, leading to inefficiencies in data transmission rates and chip area utilization.
Innovation Solution
A method for data transmission using drive signals that follow an envelope curve with a predetermined duration, where the time profile rises and falls within specific periods longer than the primary winding time constants, ensuring at least one steep flank for efficient data transfer, reducing radiated electromagnetic interference, and optimizing current and magnetic field profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If differential transmission methods are used with coreless transformers, then data transmission is achieved, but the system becomes vulnerable to disturbance signals from electromagnetic interference
Solution Approach 1:
The patent converts the harmful effect of electromagnetic interference into a beneficial detection mechanism. By monitoring disturbance signals on the transmission line and using them to trigger retransmission, the system transforms the threat of interference into an active error correction feature that improves overall transmission reliability
Solution Approach 2:
The patent implements a feedback mechanism where disturbance signals detected on the transmission line are monitored and used to control retransmission of data packets. The system continuously checks for disturbances and adjusts transmission behavior based on detected conditions, creating a closed-loop error correction system
2Reliability
If signal pulses are repeated periodically to correct transmission errors, then robustness against disturbance signals is improved, but power consumption increases
Solution Approach 1:
The patent uses periodic repetition of signal packets only when disturbances are detected, rather than continuous periodic repetition. This conditional periodic action maintains transmission robustness while avoiding the continuous power consumption of unconditional signal repetition
Solution Approach 2:
The patent changes the transmission parameters dynamically based on detected disturbance conditions. When disturbances are detected, the system adjusts by retransmitting packets; when no disturbances are present, normal transmission continues, optimizing power consumption based on actual transmission conditions
3Speed
If the rise period and fall period are shorter than the winding time constant, then transmission speed increases, but the winding parameters limit the achievable transmission rate
Solution Approach 1:
The patent employs dynamic signal shaping where the rise and fall periods are optimized based on the specific winding parameters of the transformers used. This allows the system to adapt the transmission waveform dynamically to match the electrical characteristics of the components, maximizing transmission speed within the physical constraints of the winding parameters
Solution Approach 2:
The patent optimizes the rise and fall periods of the drive signals to be substantially equal to the winding time constants, rather than attempting to make them shorter. This parameter optimization achieves the maximum possible transmission rate given the physical constraints of the transformer windings, effectively utilizing the available chip area
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances data transmission robustness against interference, reduces electromagnetic emissions, and allows for higher transmission rates with lower power consumption, while minimizing the impact of parasitic inductances and chip area requirements.
Implementation Method 1
driving the primary windings to transmit an information event by means of drive signals... The sum of the drive signals follows an envelope curve
Implementation Method 2
data transmission via a data transmission path with inductive transformers... having a primary winding and a secondary winding
Data Source
AI summary
A method and an apparatus for data transmission via a transmission path having at least two inductive transformers, which each have a primary winding with a time constant and have a secondary winding. The method includes driving the primary windings to transmit an information event by means of drive signals in such a way that the sum of the drive signals follows an envelope curve with an envelope curve duration. The envelope curve being chosen such that its time profile rises within a rise period from an initial value to a maximum value and falls within a fall period from the maximum value back to the initial value, and the magnitudes of the rise period and of the fall period are longer than the time constants of the primary windings. The time profile of the drive signals being dependent on the information to be transmitted and being chosen such that there is at least one steep flank, whose flank duration is shorter than the time constants of the primary windings.