Dual Decoder for Wireless Charging Receiver
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Solution Overview
Problem
Wireless charging receivers often experience decoding failures due to noise and frequency deviations, leading to disconnection from wireless transmitters, particularly when phase shift pulse width modulation is used, resulting in missed packets and communication breakdowns.
Innovation Solution
A dual decoder system is implemented in the wireless charging receiver, comprising a frequency decoding circuit and a voltage amplitude decoding circuit, which are complementary to each other, using frequency sampling and AC voltage amplitude sampling respectively, to ensure robust communication by compensating for decoding failures in each other's mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single decoder is used in the wireless charging receiver, then the device complexity is low, but the reliability of communication is poor due to decoding failures under noisy conditions or frequency deviations
Solution Approach 1:
The single decoder is segmented into two independent decoders: a frequency decoder that demodulates frequency-modulated signals and a voltage decoder that demodulates voltage-modulated signals. Each decoder handles specific modulation types, allowing the system to reliably process different communication protocols without requiring a complex unified decoder structure.
Solution Approach 2:
The dual decoder system provides multi-functionality by enabling the wireless charging receiver to decode both frequency-modulated signals (from the transmitter to receiver) and voltage-modulated signals (from the receiver to transmitter). This universal decoding capability ensures reliable bidirectional communication across different modulation schemes.
2Measurement precision
If frequency decoding is used to demodulate signals, then the decoding accuracy is high under stable frequency conditions, but the system becomes vulnerable to frequency deviations and noise
Solution Approach 1:
Different decoding methods are applied to different signal characteristics: frequency decoding is used for its high accuracy under stable conditions, while voltage decoding is used as a complementary method that is more robust to frequency deviations. The system selectively applies the appropriate decoding method based on the signal characteristics, optimizing both precision and reliability.
3Reliability
If voltage amplitude decoding is used to demodulate signals, then the system is more robust to frequency deviations, but the decoding accuracy decreases under noisy conditions
Solution Approach 1:
The system prepares for potential decoding failures by having a complementary decoder ready in advance. When frequency decoding fails due to noise or interference, the voltage decoder is already positioned to take over and recover the message, providing a cushion against communication failures without requiring real-time complex decision-making.
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
The dual decoder system effectively addresses decoding failures, ensuring reliable communication by allowing one decoding circuit to take over when the other fails, thereby maintaining a stable connection between the wireless receiver and transmitter, even under noisy conditions or frequency deviations.
Implementation Method 1
a resonant circuit and a rectifier circuit, wherein the rectifier circuit converts wireless energy received by the resonant circuit into a direct current
Implementation Method 2
the rectifier circuit converts wireless energy received by the resonant circuit into a direct current
Implementation Method 3
The frequency decoding circuit is coupled to the resonant circuit, and performs decoding according to a frequency of a voltage of the resonant circuit to obtain an instruction of a wireless transmitter
Implementation Method 4
The voltage amplitude decoding circuit is coupled to the resonant circuit, extracts a carrier on the voltage of the resonant circuit through a filter, and decodes the carrier into the instruction of the wireless transmitter
Data Source
AI summary
A dual decoder for a wireless charging receiver and a wireless charging receiver using the same are provided. The wireless charging receiver includes a resonant circuit, a rectifier circuit and a dual decoder for the wireless charging receiver. The rectifier circuit coupled to the resonant circuit converts wireless energy received by the resonant circuit into a direct current. The dual decoder includes a frequency decoding circuit and a voltage amplitude decoding circuit. The frequency decoding circuit performs decoding according to a frequency of a voltage of the resonant circuit to obtain an instruction of a wireless transmitter. The voltage amplitude decoding circuit extracts a carrier on the voltage of the resonant circuit through a filter, and decodes the carrier into the instruction of the wireless transmitter. With the complementary of two-way decoding, the communication system becomes robuster.