benji54
Newbie level 5
Hi everyone,
I'm using a Capsense from PSoC which is use a Sigma Delta Modulator to measure a capacitance.
First of all they assume that the capacitance is equivalent to a resistor with switch sw1 and sw2:
After that we have:
I don't understand how they find:
Ic is the current trough the resistor Rc right?
How when we replace Ic=Iavg we have:
Thank you very much
I'm using a Capsense from PSoC which is use a Sigma Delta Modulator to measure a capacitance.
First of all they assume that the capacitance is equivalent to a resistor with switch sw1 and sw2:
After that we have:
I don't understand how they find:
Code:
Ic= Cs Fs VcmodHow when we replace Ic=Iavg we have:
Code:
dmod = Cs fs (vref/Idac)Thank you very much