Input Sensor Receive Circuit Phase Fluctuation Compensation
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Solution Overview
Problem
Conventional IQ demodulators used in input sensors have complex circuit structures and are prone to failure in demodulating signals due to phase fluctuations between carrier and input signals, leading to suboptimal performance.
Innovation Solution
The proposed input sensor employs a simplified receive circuit configuration with an amplifier circuit, rectifier circuit, analog-to-digital converter, and switching elements to process input signals, compensating for phase differences and outputting a normal demodulation signal without relying on carrier waves, thereby ensuring stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an IQ demodulator is used for signal processing, then demodulation capability is achieved, but circuit structure becomes complex and hardware size increases
Solution Approach 1:
The patent extracts and eliminates the carrier wave from the signal processing system. Instead of using a carrier wave for demodulation, the invention directly processes the input signal through an amplifier circuit and rectifier circuit, removing the complex IQ demodulator and its associated carrier generation components. This extraction of the carrier wave function leads to a simplified circuit structure while maintaining demodulation capability.
Solution Approach 2:
The patent replaces the traditional carrier-wave-based demodulation mechanism with a direct signal processing approach using amplifier and rectifier circuits. This substitution eliminates the need for phase-locked loops, mixers, and complex modulator components, achieving a more straightforward electrical processing system that achieves the same demodulation function with simpler hardware.
2Productivity
If an IQ demodulator with carrier wave is used, then signal processing is performed, but demodulation fails when phase difference exists between carrier and input signal
Solution Approach 1:
Instead of trying to synchronize the carrier wave phase with the input signal (the traditional approach), the invention inverts the approach by directly processing the input signal without requiring phase synchronization. The amplifier circuit amplifies the input signal directly, and the rectifier circuit processes the amplified signal, eliminating the phase-matching requirement that causes demodulation failure in conventional systems.
Solution Approach 2:
The patent converts the harmful phase difference between carrier and input signal into a non-issue by eliminating the carrier wave entirely. The phase difference that previously caused demodulation failure is now irrelevant because the system directly processes the input signal's phase characteristics through the amplifier and rectifier circuits, turning the previously harmful phase mismatch into an acceptable feature of the simplified processing approach.
3Productivity
If carrier wave is used for demodulation, then signal processing is enabled, but hardware size increases
Solution Approach 1:
The patent removes the carrier wave and associated generation circuitry from the system. By extracting these components, the hardware size is significantly reduced while the essential signal processing function is maintained through the simplified amplifier and rectifier circuit configuration.
Solution Approach 2:
The patent merges the functions of multiple separate components (carrier generator, mixer, demodulator) into a single integrated processing path using the amplifier circuit and rectifier circuit. This consolidation of functions reduces the overall hardware footprint while maintaining signal processing capability.
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 configuration results in a more compact and efficient input sensor that maintains demodulation accuracy regardless of phase differences, improving signal processing and reducing hardware complexity.
Implementation Method 1
charging a first voltage in a first capacitor through a first diode connected in a forward direction, charging a positive-polarity voltage of an amplified input voltage in the first capacitor through the first diode
Data Source
AI summary
Disclosed is an input sensor which includes a plurality of sensing parts, an amplifier circuit that is connected to the sensing parts, a rectifier circuit connected to the amplifier circuit, an analog-to-digital converter that is connected to the rectifier circuit, an output switching element that controls a connection of the rectifier circuit and the analog-to-digital converter, a first connection switching element that controls a connection of the amplifier circuit and the rectifier circuit, a second connection switching element that connects a first voltage line to the rectifier circuit, and a third connection switching element that connects a second voltage to be applied to the rectifier circuit.