Pro Audio Design Forum

Thank you for the replies! I had two laptops die & have been traveling and am finally able to get back here! I am not sure where I got the idea that the pyroelectric signal was common mode. Ultimately it's based on my misunderstanding..I cannot see anything I would argue on the side of it being ...

Apparently the temperature signal is common mode. Most charge amp schematics I see are not differential, but I know there are some commercial products for vibration analysis that are SE or differential...I guess one chooses what one needs... I haven't yet because I want a good handle on what specs I...

Looks like I typed too long and got logged out. Apologies if a dual post DOES appear, as well as my wordiness. Detail seems to be necessary. Hello: I will do my best to make this a relatively short post...very difficult for me... I am experimenting with some large polymer piezo and electret sensors....