Time-Interleaved SAR ADC Reconfiguration for Channel Insertion Loss
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Solution Overview
Problem
High-speed communication systems face challenges in efficiently managing insertion loss in receiver devices, particularly in adapting to different communication ranges, as existing technologies struggle to optimize analog-to-digital conversion while balancing power consumption and data rate.
Innovation Solution
The implementation of a receiver device with time-interleaved analog-to-digital converters (ADCs) that include multiple sub-ADCs with successive approximation (SAR) ADC slices, allowing for reconfiguration based on insertion loss modes to adjust the number of active ADC slicers according to communication range, thereby optimizing channel insertion loss and power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the sampling rate of ADC is increased to support higher data rates, then the data rate capability is improved, but power consumption increases
Solution Approach 1:
The ADC is reconfigured dynamically based on the communication mode. In short-range mode, all SAR ADC slices are enabled to achieve high sampling rates for high data rates. In long-range mode, fewer slices are enabled to reduce power consumption while maintaining adequate performance for lower data rates.
Solution Approach 2:
The number of active SAR ADC slices is changed based on the communication mode. The ADC operates with different effective resolutions and sampling rates depending on whether short-range or long-range mode is selected, optimizing the balance between data rate capability and power consumption.
2Reliability
If more SAR ADC slices are enabled to handle higher insertion loss, then the insertion loss tolerance is improved, but power consumption increases
Solution Approach 1:
The receiver adapts its ADC configuration dynamically based on the detected communication mode and channel conditions. When long-range communication is detected (higher insertion loss), more SAR ADC slices are enabled to provide the necessary dynamic range and signal fidelity. When short-range communication is detected, fewer slices are enabled to conserve power.
Solution Approach 2:
The effective resolution and number of active ADC channels are adjusted based on the insertion loss characteristics of the communication channel. This allows the system to optimize the balance between signal recovery capability and power consumption by matching ADC resources to actual channel conditions.
3Length of moving object
If the receiver is designed for long-range communication with high insertion loss tolerance, then the communication range is improved, but the performance for short-range communication deteriorates
Solution Approach 1:
The receiver configuration is dynamically adjusted based on the communication mode. For long-range mode, the ADC is configured with more active slices to handle high insertion loss. For short-range mode, the ADC is reconfigured to use fewer slices optimized for lower noise and higher precision, improving performance when channel conditions are good.
Solution Approach 2:
The ADC architecture supports multiple operating modes by reconfiguring the number of active SAR ADC slices. The same physical hardware can be optimized for either long-range high-insertion-loss scenarios or short-range low-insertion-loss scenarios, providing universal functionality across different communication requirements.
Data Source
AI summary
A receiver having analog-to-digital converters (ADC) is disclosed. The ADCs may be reconfigured based on the insertion loss mode of the receiver. For example, different portions of a plurality of time-interleaved successive approximation (SAR) ADC slices included in at least one sub-ADC of each time-interleaved ADC may be enabled depending on which of a plurality of insertion loss modes is selected for operation of the receiver.