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like kripacharya said, gnd is arbitrary. it depends on what your reference is. Refer to the stack made by wp100 and then if you connect a voltmeter with negative pin at center and positive pin at top you will get +2.4V, with the positive pin at the bottom you will get -2.4V. Now if you connect...
Though not on the schematic, I did end up connecting the SD pin to VCC but it didn't stop the issue. Here are some other things that I tried:
1. Disconnected R6 and checked the output at the instrumentation amp to rule out the final opamp as the issue.
2. Removed the voltage divider and...
I thought that is what R7(1Mohm) and R8(1Mohm) are doing (both connected to VR which is half the rail voltage).
In fact, when the output stops it runs to 2.5V which is the common mode voltage (VR).
I am not using the RL circuit, as this is just for some simple proof of concept and I think that...
I am trying to make a simple ECG amplifier using INA 321 and OPA 336. I am driving this amplifier using a an ECG simulator(https://www.heinstruments.com/ecg-simulator.htm), hence I do not have a right leg drive circuit.
My schematic is attached. I have made the circuit on a breadboard for now...
@FvM,
What do you suggest I do? Redesign the board using the suggested rogers board? Also, I do now have small enough vias. The smallest vias I can do is 0.6mm. Is there a way to get around that?
I am trying to use a dual MMIC matched amplifier to amplify a differential signal. Te schematic for the same is attached. The components used in the circuit are listed below:
Amplifier: MERA-556+ **broken link removed**
Transformers: TC1-1-13M **broken link removed**
RF Choke: TCCH-80+...
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