Physiological Signal Transceiver Circuit for Low-Power Pulse Demodulation
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Solution Overview
Problem
Current physiological signal detection devices face challenges with power consumption and circuit complexity due to the use of continuous RF signals with limited bandwidth for wireless communication, which restricts their efficiency and versatility.
Innovation Solution
The system employs a detection device and transceiver device that modulate signals into discontinuous signals, utilizing a front-end circuit to separate and amplify these signals into orthogonal in-phase and quadrature baseband signals, with a follower circuit and quadrature delay line to rotate and synthesize them, reducing power consumption and simplifying circuit configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If continuous RF signals are used for wireless communication, then data transmission can be achieved, but power consumption increases and bandwidth is limited
Solution Approach 1:
The patent employs periodic pulse signals instead of continuous RF signals for data transmission. The detection device transmits data by modulating pulse width or pulse interval, which significantly reduces power consumption while maintaining effective communication through the human body passage.
Solution Approach 2:
The system changes the signal transmission parameter from continuous RF to discontinuous pulse signals. By varying pulse width, pulse interval, or amplitude, the system achieves efficient data transmission with reduced power consumption and optimized bandwidth utilization.
2Productivity
If continuous RF signals are used for wireless communication, then data transmission can be achieved, but circuit complexity increases
Solution Approach 1:
The patent extracts and eliminates unnecessary circuit components required for continuous RF signal generation and processing. By using simple pulse signal modulation, the system removes complex RF amplifiers, frequency synthesizers, and continuous signal processing circuits, thereby simplifying the overall circuit configuration.
Solution Approach 2:
The system replaces complex electronic RF signal generation and processing mechanisms with simpler pulse signal modulation techniques. This substitution reduces circuit complexity while maintaining data transmission capability through the human body passage.
3Use of energy by moving object
If bandwidth range is reduced for discontinuous signal transmission, then power consumption decreases, but signal transmission capability must be maintained
Solution Approach 1:
The system uses periodic pulse signals with optimized pulse width and interval to ensure reliable data transmission within reduced bandwidth. The periodic nature of the pulses provides sufficient signal energy while maintaining transmission reliability through the human body passage.
Solution Approach 2:
The system dynamically adjusts pulse width, pulse interval, and amplitude based on transmission conditions to maintain signal reliability within reduced bandwidth. This dynamic parameter adjustment ensures optimal power efficiency while preserving transmission reliability.
Data Source
AI summary
A physiological information collecting system and a transceiver device thereof are configured to collect physiological information from animal bodies. The transceiver device includes a front-end circuit, a follower circuit, a quadrature delay line and an output circuit. The front-end circuit separates a discontinuous signal into an in-phase signal and a quadrature signal. The follower circuit outputs a control voltage and rotates the in-phase signal by a predetermined phase angle to output a follower signal. The quadrature delay line rotates the quadrature signal by a corresponding phase angle according to the control voltage. The output circuit synthesizes the follower signal and the quadrature signal and outputs a data signal by demodulating the discontinuous signal. Consequently, the transceiver device reduces the bandwidth range of the discontinuous signal when receiving the discontinuous signal, reduces the power consumed by the transceiver device, and demodulates the discontinuous signal with various transmission rates of different data.