Rectifier Circuit Modulation via Active Circuits
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Solution Overview
Problem
Existing wireless communication and power transfer systems face inefficiencies due to the need for additional components like switching transistors and impedance control circuits, which incur power losses and reduce efficiency in modulation schemes such as ASK modulation.
Innovation Solution
The implementation of a rectifier circuit with active circuits that operate in half-active or full-active modes, allowing for impedance modulation without additional power paths, using active circuits to control impedance and modulate signal amplitude, and enabling efficient wireless power and data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional components such as switching transistors and impedance control circuits are used to achieve ASK modulation, then modulation capability is improved, but device complexity and power loss increase
Solution Approach 1:
The patent combines the rectifier circuit and modulator circuit into a single integrated apparatus. The rectifier circuit includes active circuits that can be selectively operated to modulate the signal amplitude, eliminating the need for separate impedance control circuits. This merging of functions reduces device complexity while maintaining modulation capability.
Solution Approach 2:
The rectifier circuit is designed to perform multiple functions: it rectifies the incoming signal and simultaneously provides modulation capability through its active circuits. By making the rectifier circuit universal, the patent eliminates the need for separate dedicated modulation components, thereby reducing overall device complexity.
2Adaptability or versatility
If additional components such as switching transistors and impedance control circuits are used to achieve ASK modulation, then modulation capability is improved, but power loss increases
Solution Approach 1:
By merging the rectifier and modulator functions into a single circuit, the patent eliminates the power losses that would occur in separate impedance control circuits. The active circuits within the rectifier circuit are optimized to provide both rectification and modulation with minimal power dissipation.
Solution Approach 2:
The rectifier circuit performs self-modulation by selectively operating its active circuits based on the incoming signal characteristics. This self-service approach eliminates the need for separate power-consuming impedance control circuits, thereby reducing overall power loss while maintaining modulation capability.
3Use of energy by moving object
If half-active mode operation is used to reduce power consumption, then power efficiency is improved, but modulation performance may be compromised
Solution Approach 1:
The patent implements dynamic operation of the active circuits within the rectifier circuit. The circuits can be selectively activated or deactivated based on the modulation requirements, allowing the system to adapt between power-saving half-active mode and full-active modulation mode as needed. This dynamic behavior enables the system to optimize between power consumption and modulation performance.
Solution Approach 2:
The patent changes the operational parameters of the active circuits to achieve different modes of operation. By controlling the activation state of the active circuits, the system can switch between half-active mode for power efficiency and full-active mode for enhanced modulation performance, thereby adapting to different operational 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 approach enhances efficiency by reducing power consumption and eliminating the need for separate impedance control circuits, while maintaining effective modulation and data extraction capabilities.
Implementation Method 1
The inductive antenna has a first end connected to the AC node in a first one of the current paths and a second end connected to the AC node in the second one of the current paths, and provides both wireless power and a signal via the AC nodes
Implementation Method 2
a rectifier circuit and a modulator circuit. The rectifier circuit has a plurality of active circuits and an output port, operates in a first mode that is at least a half-active mode in which at least one of the active circuits passes the signal
Data Source
AI summary
Various aspects of the present disclosure involve communications, and more specifically wireless communications with modulation. As may be implemented in accordance with one or more embodiments, a rectifier having a plurality of active circuits operates in first and second modes to modulate signals communicated via an antenna as follows. The first mode is at least a half-active mode in which at least one of the active circuits passes the signal, and the second mode consumes less power than the first mode. A modulator modulates a waveform of the signal by selectively operating at least one of the plurality of active circuits, therein setting an impedance of the rectifier and modulating an amplitude of the signal.