| Electronics > Beginners |
| Do Analog Multiplexers need a GND connection |
| (1/1) |
| Arznei:
Hello, I am having a hard time getting this straight in my head. I am trying to have an analog test signal pass through an unknown impedance that could have a voltage source inside it. So my plan was to have the impedance decoupled with capacitors like shown in the attached schematic. First of all: I am not even sure this works, so if you can give me some input on that I would appreciate it. Now on top of that i would like to switch between different outputs, for example the external impedance under test and a known calibration one. I figured it would be best to have the path selection after C1. However I am not sure if an analog multiplexer like ADG739 would work in that instance? I mean the output behind C1 is not really tied to GND, so will it pass through an analog switch without problems? Thank you for any advice! |
| MasterT:
Something is not right with your schematic, https://www.eecs.tufts.edu/~dsculley/tutorial/opamps/opamps5.html MUX better to put at the OPA output, than you always would know DC bias point, and control it if it's necessary. |
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