Configurable Sensor Signal Filtering in A/D Conversion Circuits
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing circuit devices lack the ability to set filter characteristics according to user-specific applications, limiting their adaptability and effectiveness in converting analog signals from sensor elements into digital signals for filtering processes.
Innovation Solution
A circuit device comprising an A/D conversion circuit, an interface circuit for receiving filter setting data, a storage circuit for storing this data, and a signal processing circuit that performs multiple digital filtering processes based on the stored filter settings, allowing for customizable filtering characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed filter characteristic is used in the circuit device, then the device complexity is reduced and manufacturing is easier, but the adaptability to user-specific applications is limited
Solution Approach 1:
The filter characteristic is made dynamically configurable through filter setting data that can be input via an interface circuit and stored in a storage circuit. This allows the filter characteristic to be changed according to different user applications without altering the physical circuit structure, thereby improving adaptability while maintaining relatively simple device architecture.
Solution Approach 2:
The invention changes the filter characteristic parameters through digital filter setting data rather than through physical circuit modifications. By storing and applying different filter setting data, the same circuit can achieve different filter characteristics (such as cutoff frequency, filter order) to meet various user requirements, resolving the contradiction between adaptability and device complexity.
2Reliability
If multiple digital filtering processes are performed with customizable characteristics, then the filtering effectiveness for specific applications is improved, but the device complexity and processing time increase
Solution Approach 1:
The signal processing circuit is designed with multi-functionality to perform multiple digital filtering processes with different characteristics using the same hardware resources. By utilizing filter setting data to configure the filtering parameters, a single circuit structure can achieve multiple filtering functions, improving filtering effectiveness without proportionally increasing device complexity.
Solution Approach 2:
The filtering process is made dynamic and configurable through the interface circuit and storage circuit that hold filter setting data. This allows the signal processing circuit to adapt its filtering characteristics based on stored data, enabling effective filtering for specific applications while avoiding the need for multiple fixed filter circuits.
3Adaptability or versatility
If filter setting data is stored in a storage circuit, then the adaptability to different filter characteristics is improved, but the device complexity and memory requirements increase
Solution Approach 1:
Instead of storing multiple complete filter circuit configurations, the invention stores compact filter setting data that defines filter characteristics (such as cutoff frequency, filter order parameters). This approach significantly reduces the memory requirements compared to storing full circuit configurations, while still enabling high adaptability through parameter-based configuration.
Solution Approach 2:
The invention uses digital filter setting data as a virtual copy or representation of the desired filter characteristics, rather than physically implementing multiple filter circuits. This digital representation requires minimal storage space while providing the same functional adaptability as multiple physical filter configurations would provide.
Data Source
AI summary
A circuit device includes an A/D conversion circuit that A/D converts a signal output from a sensor element, an interface circuit that receives filter setting data that determines a characteristic of each of a plurality of digital filtering processes, a storage circuit that stores the filter setting data, and a signal processing circuit that sequentially performs each of the plurality of digital filtering processes with characteristics determined by the filter setting data on a digital signal output from the A/D conversion circuit.