Semiconductor IC Regulator for Non-Contact Antenna Modulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In non-contact electronic devices, long communication distances result in reduced signal amplitude and increased output resistance, leading to small current changes at the antenna terminals, making data transmission to the interrogator unreliable.
Innovation Solution
A semiconductor integrated circuit with an antenna, rectifier, load modulation, and regulator functions, where the voltage change at the antenna terminals is increased for small input currents and decreased for large input currents, enhancing load modulation current for long-distance communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the communication distance is increased, then the coverage area is improved, but the signal amplitude is decreased and output resistance is increased
Solution Approach 1:
The patent changes the electrical parameters (voltage and current) at the antenna terminals dynamically. By increasing voltage for small currents and limiting voltage for large currents, the system adapts to different communication distances and load conditions, maintaining reliable data transmission even at long distances where signal amplitude naturally decreases.
Solution Approach 2:
The patent introduces dynamic control of the antenna terminal characteristics through the voltage-current relationship management. The regulator circuit dynamically adjusts the operating point of the antenna terminals based on the current flowing through them, enabling the system to adapt to varying communication conditions and maintain optimal performance across different distances.
2Strength
If the output resistance is increased, then the voltage amplitude is improved, but the current change is decreased
Solution Approach 1:
The patent dynamically changes the voltage-current parameters at the antenna terminals based on the operating conditions. The regulator circuit monitors the current and adjusts the voltage accordingly, ensuring that both voltage amplitude and current change remain within optimal ranges for reliable data transmission, even when output resistance varies with communication distance.
Solution Approach 2:
The patent implements a feedback mechanism where the regulator circuit continuously monitors the current flowing through the antenna terminals and adjusts the voltage to maintain the desired operating characteristics. This feedback control ensures that the voltage-current relationship remains optimal for data transmission regardless of changes in output resistance due to communication distance.
3Reliability
If the voltage is increased for small currents, then the load modulation current is improved, but the element withstand voltage may be exceeded
Solution Approach 1:
The patent dynamically changes the voltage parameter at the antenna terminals based on the current level. For small currents, the voltage is increased to enhance load modulation current and improve data transmission reliability. For large currents, the voltage is limited to prevent exceeding element withstand voltage and causing damage. This dynamic parameter adjustment resolves the contradiction between improving transmission and preventing damage.
Solution Approach 2:
The patent introduces dynamic control of the voltage-current relationship at the antenna terminals. The regulator circuit continuously adapts the operating parameters based on real-time conditions, increasing voltage when needed for reliable modulation and limiting it when necessary to protect elements, thereby resolving the contradiction between transmission reliability and element protection.
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 configuration enables stable and efficient data transmission to the interrogator over long distances by generating a large load modulation current, ensuring reliable communication.
Implementation Method 1
it operates by generating power from electromagnetic waves received by an antenna
Implementation Method 2
there exists a circuit technology in which a highly efficient and stable power supply voltage is generated by combining a rectifier function and a regulator function
Data Source
AI summary
Depending on the power supplied to the non-contact electronic device, the voltage suppression characteristic of the regulator function mounted in a power supply circuit is changed. When the power supplied to the non-contact electronic device is small, the voltage change amount of the voltage between antenna terminals for the current flowing in the antenna is increased, and when the power supplied to the non-contact electronic device is large, the voltage change amount of the voltage between the antenna terminals for the current flowing in the antenna is decreased. By this means, the current change of the entire consumption current for the current change of the load modulator (transmitting circuit) at the time of the long distance communication is increased.