Time-Multiplexed Digital Filter Circuit for Mixed Data Rates
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Solution Overview
Problem
Existing digital filter circuits require additional processing units to handle input signals with different data rates, leading to increased costs and complexity in real-time signal processing.
Innovation Solution
A digital filter circuit with an input multiplexer sub-circuit and an output multiplexer sub-circuit that selectively forwards input signals to a single digital filter, allowing for efficient processing of signals with different data rates using switchable configurations and adjustable filter taps and parallelization, eliminating the need for additional processing units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additional processing units are used to process signals with different data rates simultaneously, then processing capability and real-time performance are improved, but device complexity and cost increase
Solution Approach 1:
The patent makes a single digital filter capable of processing multiple signal types with different data rates by configuring it to operate in different modes. The filter can be dynamically adjusted to handle both high-rate and low-rate signals, eliminating the need for separate processing units for each signal type while maintaining real-time processing capability
Solution Approach 2:
The digital filter is designed with dynamic reconfiguration capability, allowing it to switch between different operating modes and data rates as needed. This dynamic adaptability enables one filter to replace multiple static filters, reducing overall system complexity while maintaining the ability to process diverse signals simultaneously through time-multiplexed operation
2Productivity
If additional processing units are used to process signals with different data rates simultaneously, then real-time processing performance is improved, but cost increases
Solution Approach 1:
The digital filter is designed as a universal processing unit that can handle multiple signal types and data rates through configuration changes rather than requiring separate hardware units. This multi-functionality reduces the total number of components needed, lowering manufacturing costs while maintaining real-time processing performance for diverse signals
Solution Approach 2:
The patent combines the functionality of multiple separate processing units into a single digital filter. By merging high-rate processing and low-rate processing capabilities into one reconfigurable unit, the system reduces component count and associated costs while preserving the ability to process different signals in real-time through time-multiplexed operation
3Device complexity
If a single digital filter is used to process signals with different data rates, then device complexity and cost are reduced, but processing speed may be compromised
Solution Approach 1:
The system employs periodic time-multiplexed operation where the single digital filter alternates between processing high-rate signals and low-rate signals in structured time slots. This periodic switching allows the filter to maintain high processing speeds for each signal type by dedicating specific time periods to each data rate, preventing speed degradation while using fewer components
Solution Approach 2:
The digital filter dynamically adjusts its operating parameters and data rate to match the current signal being processed. This dynamic adaptation allows the single filter to operate at optimal speed for each signal type, maintaining high processing performance while reducing device complexity compared to having multiple fixed-rate filters
Data Source
AI summary
A digital filter circuit for filtering at least two input signals having different signal data rates is described. The digital filter circuit includes an input multiplexer sub-circuit, a digital filter, and an output multiplexer sub-circuit. The digital filter is connected to the input multiplexer sub-circuit downstream of the input multiplexer sub-circuit. The digital filter is connected to the output multiplexer sub-circuit upstream of the output multiplexer sub-circuit. The input multiplexer sub-circuit is configured to receive the at least two input signals having different signal data rates. The input multiplexer sub-circuit is configured to selectively forward the at least two input signals to the digital filter. The digital filter is configured to filter the at least two input signals, thereby obtaining at least two filtered input signals. The output multiplexer sub-circuit is configured to selectively output the at least two filtered input signals. Further, a measurement instrument and a signal processing method are described.