What do you want to know in this thread?
Please post the details.
Thank you for your response,
I´m trying to adquire EMG signal in differential mode using 3 OPAMPs before SAR. Is this method correct? Is there any way to adquire more than 1 channel?
Another thing, where can I put the reference? I thought put the reference in the Injection channel of SAR but I don´t know how to control the baseline in firmware.
The EMG signal seems to have a range of about -5 to +5 mV.
Those. this is ~ 5 times the ECG signal.
They have similar concomitant problems and interferences.
Yes, you can use 3 OPAMPs before SAR.
considering that amplifiers should have a small offset (> + 300mV)
This forum has several topics about ECG.
thank you for your response. As you said, EMG and ECG have a quite similar adquisition circuit but there are some differences, for example, the reference circuit, I couldn´t find anythin in this forum about that, do you know something about it?
Thank you, I will take a look in both links you have shared. Is it possible to use the PSoC 5LP integrated in CY8CKIT-044 to use its components within the same project that I designed with PSoC 4?
I don't have CY8CKIT-044 so I don't know the answer.
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No. To use PSoC5 integrated into KIT-044, it has to be programmed in a separate project. Though some people do that, in my opinion it is not worth the hassle. Since PSoC5 is used as a programmer, you have to reprogram back-and-force each time PSoC4 project needs to be updated. If PSoC4 resources are not enough, I would recommend $10 cy8ckit-059 PSoC5 prototyping board, or, in case of opamps, use external ones.
Another low budget approach is to utilize low-cost 24-bit Delta Sigma ADC HX711, operating at 80Hz.
which has built-in opamp