Super-Regenerative Receiver Bandwidth Control for Low-Power Selectivity
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Solution Overview
Problem
Ultra-low power super-regenerative receivers face performance degradation due to the low selectivity characteristic of their frequency response, leading to increased power consumption and complexity in wireless sensor networks, particularly in applications like wireless body area networks where low power and low complexity are crucial.
Innovation Solution
The implementation of an ultra-low power super-regenerative receiver with a bandwidth adjustor that dynamically adjusts the quench waveform based on the received signal's bandwidth, controlling the period and slope at the zero-crossing point to improve signal selectivity and reduce power consumption, while maintaining accurate synchronization and data detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If ultra-low power analog circuit is used, then power consumption is reduced, but overall system performance degrades
Solution Approach 1:
The patent applies dynamics by making the quench waveform characteristics adjustable rather than fixed. The bandwidth adjustor dynamically changes the quench waveform's period and slope based on the received signal's bandwidth, allowing the system to adapt to different operating conditions and maintain optimal performance across varying power consumption levels
Solution Approach 2:
The patent changes key parameters of the quench waveform including its period and slope at the zero-crossing point. By adjusting these parameters based on the received signal's bandwidth, the system optimizes its frequency response selectivity while maintaining ultra-low power operation, thereby resolving the contradiction between low power consumption and system performance
2Device complexity
If fixed quench waveform is used, then device complexity is reduced, but signal selectivity is insufficient
Solution Approach 1:
The patent transitions from a fixed quench waveform to a dynamic one where the bandwidth adjustor modifies the quench waveform's characteristics in real-time based on the received signal. This dynamic adjustment improves signal selectivity without requiring overly complex hardware, as the adjustment is performed through controlled parameter variation rather than multiple fixed waveforms
Solution Approach 2:
The patent adjusts the period and slope parameters of the quench waveform based on the received signal's bandwidth. This parameter change approach improves signal selectivity by optimizing the frequency response characteristics, while maintaining relatively simple device architecture by using a single adjustable waveform generator
3Adaptability or versatility
If bandwidth is increased, then signal reception capability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic bandwidth adjustment by modifying the quench waveform's period and slope characteristics based on the received signal's bandwidth. This allows the receiver to adapt its bandwidth to match the incoming signal, improving reception capability for signals of different bandwidths while avoiding unnecessary power consumption associated with fixed wide bandwidth operation
Data Source
AI summary
An ultra-low power super-regenerative receiver and method thereof are provided. The ultra-low power super-regenerative receiver includes a quench waveform generator configured to generate a quench waveform. The ultra-low power super-regenerative receiver further includes a super-regenerative oscillator configured to generate an oscillation signal based on the quench waveform. The ultra-low power super-regenerative receiver further includes a bandwidth adjustor configured to control the quench waveform based on a bandwidth of a signal received by the ultra-low power super-regenerative receiver, to dynamically adjust a bandwidth of the oscillation signal.