Demodulation Circuit Signal Processing Cost Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional demodulation circuits in wireless charging devices require multiple filters and amplifiers, increasing manufacturing costs, circuit area, and power consumption.
Innovation Solution
A demodulation circuit comprising a detection unit, switch unit, delay unit, demodulation unit, amplifier, analog digital converter, and control unit that compares pulse width modulation signals with delayed signals to generate demodulation signals without the need for low-pass or high-pass filters, reducing the number of required components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional demodulation circuit uses multiple filters and amplifiers to demodulate signals, then signal processing capability is improved, but manufacturing cost and circuit area increase
Solution Approach 1:
The patent extracts and eliminates unnecessary filtering components (low-pass filter and high-pass filter) from the traditional demodulation circuit. The invention demonstrates that these filters are not essential for the core demodulation function, and their removal simplifies the circuit structure while maintaining signal processing capability through the use of a comparator and reference voltage approach.
Solution Approach 2:
The patent makes the amplifier serve multiple functions by eliminating the need for separate filtering stages. The amplifier is configured to work directly with the comparator and reference voltage to achieve both signal amplification and demodulation, thereby reducing the total number of components required while maintaining functional effectiveness.
2Reliability
If traditional demodulation circuit uses multiple filters and amplifiers, then signal processing capability is improved, but power consumption increases
Solution Approach 1:
The patent removes unnecessary filtering components that consume power without providing essential functionality. By eliminating the low-pass filter and high-pass filter, the circuit reduces its power consumption while maintaining adequate signal processing capability through the simplified demodulation approach using comparator and reference voltage.
Solution Approach 2:
The patent applies partial action by using a single amplifier instead of multiple amplifiers and filters. The amplifier is configured to provide just sufficient gain for the demodulation task, avoiding excessive amplification that would increase power consumption unnecessarily while still achieving the required signal processing performance.
3Reliability
If traditional demodulation circuit uses multiple filters and amplifiers, then signal processing capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent extracts and removes unnecessary filtering components from the circuit design. By eliminating the low-pass filter and high-pass filter, the bill of materials is reduced, leading to lower manufacturing costs. The simplified circuit uses fewer discrete components that require assembly, testing, and quality control.
Solution Approach 2:
The patent merges the functions of multiple components into fewer integrated elements. The demodulation function is achieved by combining the amplifier, comparator, and reference voltage source in a simplified configuration, reducing the total component count and thereby lowering manufacturing costs through reduced assembly complexity and fewer part numbers to manage.
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 solution decreases manufacturing costs and circuit area while reducing overall power consumption by eliminating the need for multiple filters and amplifiers, enabling efficient demodulation of signals in wireless charging devices.
Implementation Method 1
The wireless charging device using the Electromagnetic Induction Technology
Data Source
AI summary
The present disclosure illustrates a demodulation circuit disposed in a wireless charging device. The demodulation circuit comprises a detection unit, a delay unit, a demodulation unit, a switch unit, an amplifier, an ADC, a control unit and a digital demodulation unit. The detection unit detects a pulse width modulation signal received by a coil, and outputs a modulation signal. The delay unit delays the modulation signal to generate a delay signal. The demodulation unit compares the modulation signal with the delay signal to generate a first demodulation signal. When the control unit detects the first demodulation signal is lower than a demodulation success rate in a time period, the control unit outputs a first switch signal to the switch unit. When the control unit detects a second demodulation signal is lower than the demodulation success rate in the time period, the control unit outputs a second switch signal to the switch unit.