Selection Circuit Delay Control for Accurate Analogue Detection
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Solution Overview
Problem
In analogue signal detection, the varying signal paths with different propagation speeds lead to inconsistent delay times, affecting the accuracy of analogue-to-digital conversion, as signals from different sources may require distinct delay settings to ensure proper detection.
Innovation Solution
An analogue-to-digital conversion system with a control device that sets a delay time prior to detection based on the selection circuit's operation, utilizing a combination of internal and external multiplexers to manage signal paths and ensure accurate conversion by accounting for the different signal path lengths through separate delay times for each multiplexer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a delay time is inserted prior to each analogue signal detection to account for limited propagation speed, then the detection accuracy is improved, but the conversion time increases
Solution Approach 1:
The delay time is made dynamic and adaptive rather than fixed. The control device determines the delay time based on the specific signal path characteristics and propagation speed of each analogue signal, allowing the system to optimize the balance between detection accuracy and conversion time for each individual signal path.
Solution Approach 2:
The delay time parameter is adjusted according to the signal path conditions. By changing the delay time parameter based on propagation speed measurements or pre-characterized signal path data, the system achieves accurate detection without unnecessarily extending the conversion time for all signals.
2Measurement precision
If different delay times are set for different signal paths to ensure proper detection, then the detection accuracy is improved, but the system complexity increases
Solution Approach 1:
A single control device performs multiple functions: it characterizes signal path properties, determines appropriate delay times, and controls the detection timing for multiple analogue signal paths. This universal approach avoids the need for separate delay control mechanisms for each signal path, reducing overall system complexity while maintaining detection accuracy.
Solution Approach 2:
The system uses parameter-based control where the delay time is adjusted according to pre-determined signal path characteristics. This parameterized approach allows different delay times for different paths without requiring complex hardware modifications, simply by changing control parameters in the unified control device.
3Measurement precision
If the propagation speed of analogue signals is taken into account with delay times, then the conversion accuracy is improved, but the conversion speed decreases
Solution Approach 1:
The delay time is dynamically adjusted based on the actual propagation speed of each signal path rather than using a conservative fixed delay. This dynamic adaptation allows the system to minimize delays while ensuring accurate detection, thereby maintaining higher conversion speeds without sacrificing accuracy.
Solution Approach 2:
By changing the delay parameter according to measured or pre-characterized propagation speeds, the system achieves the minimum necessary delay for accurate conversion. This prevents excessive delays that would reduce conversion speed while ensuring sufficient delay for accuracy.
Data Source
AI summary
A selection circuit is used for detecting analogue signals from different inputs. For the detection of a signal switched through by means of the selection circuit, a delay time during the detection of the switched-through signal is set depending on the occurrence of a setting operation in the selection circuit. The selection circuit can have a plurality of switches each having an assigned delay time and the detection can be controlled in such a way that it does not take place until after the elapsing of the delay times of all the involved in switching through the analogue signal to be detected.