Speed Sensor Signal Conditioning Circuit
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Solution Overview
Problem
Existing speed sensor systems face challenges due to noise and vibration, leading to increased complexity and cost, as well as space requirements, in converting analog signals to digital signals for monitoring rotating devices.
Innovation Solution
A circuit and system that receive an analog signal from a speed sensor, acquire a threshold, generate a digital signal based on this threshold, and output it, utilizing integrated circuitry with analog and digital components to condition the signal, thereby reducing noise and simplifying the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple discrete components are used for signal conditioning, then noise elimination and signal conversion are achieved, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple discrete components (comparator, hysteresis circuit, Schmitt trigger) into a single integrated circuit device. The comparator receives the noisy analog signal and compares it against a reference voltage, while the hysteresis circuit provides noise immunity by creating different threshold levels for rising and falling edges. The Schmitt trigger cleans up the signal transitions. All these functions are integrated into one device, reducing complexity while maintaining signal quality.
Solution Approach 2:
The integrated circuit performs multiple functions simultaneously: analog-to-digital conversion, noise filtering, hysteresis for noise immunity, and signal conditioning. This multi-functional approach eliminates the need for separate discrete components for each function, thereby reducing overall device complexity while achieving reliable noise elimination and signal conversion.
2Reliability
If multiple discrete components are used for signal conditioning, then noise elimination and signal conversion are achieved, but cost increases
Solution Approach 1:
The patent integrates multiple discrete components into a single integrated circuit, reducing the total component count and assembly requirements. This consolidation lowers manufacturing costs through reduced parts procurement, simplified assembly processes, and smaller bill of materials, while maintaining the noise elimination and signal conversion capabilities through the integrated comparator, hysteresis circuit, and Schmitt trigger functions.
3Reliability
If multiple discrete components are used for signal conditioning, then noise elimination and signal conversion are achieved, but space requirements increase
Solution Approach 1:
The patent consolidates multiple discrete components (comparator, hysteresis circuit, Schmitt trigger) into a single integrated circuit package. This dramatically reduces the physical footprint on the circuit board, as one integrated device occupies significantly less space than multiple separate components with their associated mounting pads, traces, and spacing requirements, while maintaining all necessary signal conditioning functions.
4Reliability
If analog and digital circuitry are used to eliminate noise, then signal quality improves, but design time and complexity increase
Solution Approach 1:
The patent provides a pre-integrated solution where the comparator, hysteresis circuit, and Schmitt trigger are already combined in a single device. This eliminates the need for designers to individually select, design, and coordinate multiple separate components, significantly reducing design time and complexity while maintaining signal quality through the integrated noise elimination and signal conversion functions.
Data Source
AI summary
A circuit for use in conditioning a signal from a speed sensor. The circuit is configured to receive an analog signal from a speed sensor coupled to the circuit, acquire a threshold of the analog signal, generate a digital signal corresponding to the analog signal, based on the threshold, and output the digital signal.