Asynchronous Inductive Coupling Circuit for Low-Power Data Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing inductive-coupling communication systems face challenges with high power consumption and limited data transfer rates due to the need for a common clock in synchronous systems and noise-induced malfunctions in asynchronous systems, particularly when attempting to receive double pulse voltage signals with single pulse current transmission.
Innovation Solution
An electronic circuit design that transmits data changes using a single pulse current through a coil and detects double pulse voltage signals in the receiving coil, utilizing a comparator to output a single pulse signal for data change detection, with initialization methods to set the threshold voltage and minimize errors, allowing for low-power, high-speed asynchronous inductive-coupling transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a common clock is used for synchronous transmission and reception, then data transmission reliability is improved, but power consumption increases and cost increases due to requiring clock transmission circuits
Solution Approach 1:
The patent extracts and removes the clock signal transmission requirement from the system. By using edge-triggered flip-flops that respond to transitions in the Stb signal rather than requiring a continuous clock, the system eliminates the need for clock transmission circuits, thereby reducing power consumption and cost while maintaining reliable data transmission through the inductive coupling channel.
Solution Approach 2:
The patent replaces the electronic clock synchronization mechanism with a signal transition-based synchronization mechanism. Instead of using a continuous clock signal for synchronization, the system uses the rising and falling edges of the Stb signal to trigger data latching and transmission, substituting the mechanical/electronic clock system with a transition-event-driven system that consumes less power.
2Reliability
If a common clock is used for synchronous transmission and reception, then data transmission reliability is improved, but device complexity increases due to requiring clock transmission circuits
Solution Approach 1:
The patent extracts and removes the clock signal transmission requirement from the system. By using edge-triggered flip-flops that respond to transitions in the Stb signal rather than requiring a continuous clock, the system eliminates the need for clock transmission circuits, thereby reducing power consumption and cost while maintaining reliable data transmission through the inductive coupling channel.
3Use of energy by moving object
If asynchronous reception with hysteresis comparator is used, then power consumption is reduced, but reliability decreases due to high probability of malfunction from noise
Solution Approach 1:
The patent employs periodic action through the use of edge-triggered flip-flops that respond to specific transitions (rising or falling edges) of the Stb signal. This periodic sampling mechanism allows the receiver to reliably detect data transitions at predetermined moments, reducing susceptibility to random noise while maintaining low power consumption compared to continuous synchronous reception.
Solution Approach 2:
The patent introduces the Stb signal as an intermediary that mediates between the transmitter and receiver. This signal, generated by the transmitter and detected by the receiver, serves as a synchronization marker that enables reliable data reception without requiring complex noise filtering or high-power continuous reception, thus improving reliability while maintaining low power consumption.
4Use of energy by moving object
If single pulse current transmission is used, then power consumption is reduced, but measurement precision decreases due to inability to correctly receive double pulse voltage signals
Solution Approach 1:
The patent applies dynamics by making the receiver's detection threshold variable rather than fixed. The hysteresis comparator adjusts its threshold voltage dynamically based on the previous output state, creating two different thresholds for rising and falling edges. This dynamic threshold adjustment allows the receiver to correctly interpret the double pulse voltage signals generated by single pulse current transmission, maintaining measurement precision while reducing power consumption.
Solution Approach 2:
The patent changes the parameter of the comparator's threshold voltage from a fixed value to a variable value that depends on the signal history. By implementing hysteresis, the threshold voltage switches between two levels based on whether the previous output was high or low, enabling precise detection of the double pulse signals even with low-power single pulse current transmission.
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 enables low-power, high-speed data transmission and reception by reducing power consumption and minimizing errors, eliminating the need for clock transmission and enhancing data integrity by correctly receiving double pulse signals.
Implementation Method 1
a voltage signal (VR) of a double pulse induced in a receiving coil coupled inductively to the transmitting coil
Data Source
AI summary
A low-power high-speed asynchronous inductive-coupling transmission and reception technology is provided, in which a current signal of a single pulse is made to flow through a transmitting coil, and a voltage signal of a double pulse induced in an inductively-coupled receiving coil can be received asynchronously. A transmitting circuit for performing non-contact proximity communication adopts a configuration in which current flows through a first coil in a first direction for each change of a logical value of transmit data. A receiving circuit connected to a second coil coupled inductively to the first coil employs a comparator which determines an induced voltage of a double pulse induced in the second coil by current in the first direction and outputs a unipolar single pulse signal. Whenever the single pulse signal outputted by the comparator is inputted, the receiving circuit inverts the output in a sequential circuit and reproduces receive data.