Time-Interleaved ADC Preamble Sync for Real-Time Data Alignment
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Solution Overview
Problem
Existing time interleaved ADC sampling data synchronization methods fail to determine the start position of effective data and synchronization status accurately, leading to synchronization errors and difficulties in maintaining real-time synchronization across ADC channels.
Innovation Solution
The proposed method involves converting sampling data from multiple ADC chips into serial data, generating a preamble sequence, combining it with the serial data, and using a matching clock signal to identify the start position and synchronization status without switching between test and normal operation modes, thereby simplifying synchronization and eliminating errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ADCs are switched to test mode for synchronization calibration, then synchronization status can be detected, but normal data acquisition is interrupted and mode switching introduces synchronization errors
Solution Approach 1:
The patent applies preliminary action by embedding a preamble sequence at the beginning of each ADC's data stream before normal data acquisition. This preamble contains known synchronization patterns that allow the system to identify start positions and detect synchronization status continuously during normal operation, eliminating the need to switch to test mode for calibration.
Solution Approach 2:
The patent implements continuity of useful action by enabling continuous data acquisition from all ADCs simultaneously. The preamble-based synchronization method allows the system to maintain uninterrupted data flow from multiple ADCs while continuously monitoring synchronization status, removing the stop-start calibration process that previously interrupted data acquisition.
2Productivity
If ADCs operate in normal mode continuously, then data acquisition efficiency is high, but synchronization status cannot be detected and errors cannot be identified
Solution Approach 1:
The patent uses an intermediary approach by introducing a preamble sequence as a mediator between the ADC data stream and the synchronization detection mechanism. This preamble acts as a recognizable marker that enables the system to monitor synchronization status during normal operation without interrupting data flow, allowing simultaneous high efficiency and reliable monitoring.
3Reliability
If mode switching is performed for synchronization calibration, then synchronization can be established, but synchronization errors are introduced and complexity increases
Solution Approach 1:
The patent extracts the synchronization detection function from the separate test mode calibration process and integrates it into the normal data acquisition stream through the preamble sequence. This extraction allows synchronization status to be monitored as part of the continuous data flow, eliminating the need for separate test modes and reducing operational complexity.
Data Source
AI summary
An ADC sampling data identification method and system, integrated circuit and decoding device are disclosed. The ADC sampling data identification method includes in the integrated circuit, converting sampling data from n time interleaved ADC chips into serial data, generating a preamble sequence, combining the serial data with the generated preamble sequence to obtain new serial data, sending the new serial data to a decoding device, generating a clock signal that matches the new serial data, and sending the clock signal to the decoding device; and in the decoding device, receiving the new serial data and the clock signal from the ADC integrated circuit, obtaining the preamble sequence for combining according to an agreement with the ADC integrated circuit, and identifying a start position of the sampling data from the time interleaved ADC chips.