A multi-channel asynchronous sampling ADC method to realize multi-channel synchronous sampling
A synchronous sampling and asynchronous sampling technology, applied in the direction of analog-to-digital converters, etc., can solve the problems of high power consumption and cost, high computational complexity, complex circuits, etc., and achieve the effects of low cost, balanced computing resource overhead, and low computational complexity
Active Publication Date: 2015-09-09
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Among them, method 1 and method 2 are two ways to realize multi-channel synchronous sampling with complex circuits, high power consumption and system implementation cost; method 3 realizes multi-channel synchronous sampling in a single-chip manner, but the single-chip integration of method 2 requires less power consumption. And the cost is still relatively high; Method 4 adopts the method of digital interpolation and single ADC to realize the synchronous sampling of multi-channel analog signals. It is difficult to effectively balance the cost of computing resources
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[0013] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.
[0014] The embodiment of the present invention relates to a method for multi-channel asynchronous sampling ADC to realize multi-channel synchronous sampling. In one sampling period, M times of symmetrical complex sampling is performed on the symmetrical channel sequence of N analog input channels, and then the single analog input channel Multiple sampling values are accumulated to obtain synchronous sampling data of a single ...
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The invention relates to a method for realizing multi-channel synchronous sampling by a multi-channel asynchronous sampling ADC (Analog Digital Converter), which comprises the following steps of: in a sampling period, extracting M times of symmetrical repeated sampling to symmetric channel sequences of N analog input channels, and accumulating multi times of sampling values of a single analog input channel so as to obtain single sampling point synchronous sampling data of channel sequence symmetric points of the multi channels, wherein n is more than or equal to 2, and M is more than or equal to 2. The method disclosed by the invention is low is cost and low in operating amount, and can realize effective balance between the timeliness and the expense of systematic operation resources.
Description
technical field [0001] The invention relates to the technical field of digital signal processing, in particular to a method for realizing multi-channel synchronous sampling by a multi-channel asynchronous sampling ADC. Background technique [0002] In fields such as smart grid monitoring, multi-antenna technology, and array signal processing, synchronous data acquisition of multi-channel analog signals is required. At present, the methods for realizing multi-channel synchronous data acquisition include: 1. Multi-channel ADC chip synchronous acquisition, using synchronous timing logic to ensure that the multi-channel ADC sampling and conversion timing are completely synchronized; 2. Single-channel ADC chip cooperates with multiple channels. After the sample-and-hold device completes synchronous sampling of multi-channel signals, the single-channel ADC sequentially converts the multi-channel signals in the sample-and-hold device; 3. A dedicated multi-channel synchronous sampli...
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IPC IPC(8): H03M1/12
Inventor 宋恩亮张鑫刘华巍李宝清袁晓兵
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI