Contactless Transmission Circuit Dynamic Resistance Modulation
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Solution Overview
Problem
The existing communication partner devices face limitations in achieving high data transmission rates due to high resistance values at the transmission coil, which hinder fast voltage drops, and variability in resistance transformation ratios across devices, leading to inconsistent damping and amplitude modulation characteristics.
Innovation Solution
A transmission circuit design that allows for controllable resistance values at the signal output, utilizing a modulation circuit with NMOS and PMOS transistors to generate various resistance values, enabling precise control and matching of resistance ratios across devices, thereby facilitating faster voltage drops and consistent damping conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a high-quality factor transmission coil is used, then transmission efficiency is improved, but data transmission rate is limited due to inability to achieve fast voltage drops
Solution Approach 1:
The patent applies dynamics by making the resistance value dynamic rather than fixed. The modulation circuit changes the resistance value depending on the data bit being transmitted: using a first resistance value for logic '0' and a second resistance value for logic '1'. This dynamic resistance adjustment enables fast voltage drops when needed while maintaining high quality factor for efficiency, resolving the contradiction between transmission efficiency and data transmission rate.
Solution Approach 2:
The patent changes the resistance parameter of the modulation circuit based on the data being transmitted. By switching between different resistance values (first resistance value for logic '0', second resistance value for logic '1'), the system can control the voltage drop characteristics of the transmission coil, enabling both high efficiency and high data transmission rates.
2Device complexity
If fixed resistance values are used in the modulation circuit, then device simplicity is maintained, but resistance transformation ratios vary across devices leading to inconsistent damping characteristics
Solution Approach 1:
The patent changes the resistance parameter based on transmission needs rather than using a fixed value. By implementing a modulation circuit that can switch between different resistance values, the system achieves consistent damping characteristics across devices while maintaining relatively simple circuit structure. The resistance value is adjusted dynamically to compensate for variations in transmission coil quality factor and other device-specific parameters.
Solution Approach 2:
The patent makes the resistance value dynamic by implementing a modulation circuit that switches between a first resistance value and a second resistance value based on the data bit. This dynamic adjustment enables consistent damping characteristics across different devices while avoiding the complexity of fully adaptive impedance matching circuits.
3Ease of operation
If resistance values are transformed by the signal processing circuit, then impedance matching is achieved, but fast voltage drops are hindered due to high transformed resistance values
Solution Approach 1:
The patent applies dynamics by making the resistance value in the modulation circuit dynamic. When a logic '1' needs to be transmitted, the circuit switches to a second resistance value that enables fast voltage drops, overriding the impedance matching requirement temporarily. When a logic '0' is transmitted, the first resistance value maintains proper impedance matching. This dynamic switching resolves the contradiction between impedance matching and fast voltage drop capability.
Solution Approach 2:
The patent changes the resistance parameter in the modulation circuit based on the data bit being transmitted. By switching between different resistance values, the system can prioritize either impedance matching or fast voltage drop depending on the transmission requirement, thus resolving the contradiction between these two opposing requirements.
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 design enables high data transmission rates even with high-quality factor transmission coils and ensures consistent resistance transformation across devices, optimizing damping and amplitude modulation characteristics.
Implementation Method 1
a transmission coil (7) connected to the signal processing circuit
Implementation Method 2
which signal processing circuit is designed to transform resistance values
Implementation Method 3
a carrier signal being subjected, in the transmitting mode, to amplitude modulation of a given degree of modulation in accordance with the data to be transmitted
Data Source
AI summary
In a communication partner device (1) intended for the contactless transmission of digital data to be transmitted having a transmission circuit (2), the transmission circuit (2) comprises a modulation circuit (17) for the amplitude modulation of a carrier signal (CS), which modulation circuit (17) comprises a circuit stage (20, 20′) for producing a plurality of different resistance values (RW 1, RW 1′) that act on a signal output (TX1, TX2), which resistance values (RW1, RW1′) can be transformed, by means of a signal processing circuit (3) arranged to transform resistance values that belongs to the communication partner device (1), into transformed resistance values (RW2, RW2′), which transformed resistance values (RW2, RW2′) are responsible for damping a transmission coil (7) of the communication partner device (1) when modulated low-level carrier signal sections are generated in a modulated carrier signal.