DSP Basic Learning-ADC Synchronous sampling

DSP Basic Learning-ADC Synchronous sampling

Peng

2015-04-28 20:31:06

In the DSP28027 Lauchpad learning process, the difference between synchronous sampling and sequential sampling of the ADC is a little bit of a study, here the main focus on the ADC synchronous sampling, ADC synchronous sampling has two different actual statements:

1 Multi-channel synchronous sampling : The multi-channel can be sampled at the same time, corresponding to the sampling process for sampling pin simultaneous sampling and holding (conversion can be first and then), mainly for multi-channel at the same time data acquisition , suitable for multi-input, signal level rapid change, The phase requirement is strict and so on, ( this should be the meaning that the F28027 chip wants to express!) )

2 Tracking Sampling : In order to make sampling frequency FS always maintain a fixed proportional relationship with the frequency F1 the system actually operates, the sampling frequency must be adjusted in real time with the frequency of the system running, mainly for AC sampling, and the frequency information of AC signal needs to be tracked in real time. The hardware frequency measurement device or software can be used to calculate the frequencies of the method to cooperate with the implementation;

Multi-channel synchronous sampling technology

DSP Basic Learning-ADC Synchronous sampling