Differences

This shows you the differences between two versions of the page.

--- ee:hydrophones:start [2018/01/28 15:56]
Ryan Summers [Analog Design]
+++ ee:hydrophones:start [2018/01/28 16:11]
Ryan Summers [Analog Design]
@@ Line 38: / Line 38: @@
 The analog signal goes through a five-stage amplification and filtering process. First, the signal is sent through two gain stages, each of which apply an adjustable gain to the signal. After the signal is gained into a reasonable voltage range, it is passed through a low-pass filter and then a high-pass filter to result in a bandpass filter of the signal.
-Once the signal has been filtered and gained, it is preprocessed for the ADC. In order to acquire more accurate measurements, the ADC requires signals to be differential. The analog signals are therefore put through a signle-ended to differential converter. Immediately before the signals enter the ADC, there is a low-pass anti-aliasing filtering. This filter guarantees Niquist criteria, which means that any frequencies detected in the sampled signal will not be aliases of higher frequencies.
+Once the signal has been filtered and gained, it is preprocessed for the ADC. In order to acquire more accurate measurements, the ADC requires signals to be differential. The analog signals are therefore put through a single-ended to differential converter and biased around a DC voltage supplied by the ADC. Immediately before the signals enter the ADC, there is a low-pass anti-aliasing filtering (Low-pass differential RC).

Palouse RoboSub Technical Documentation