I am thinking of a feedback i want to experiment with and i am stuck. I have an analog signal (V1) from the output of an op-amp which is sinusoidal, 60Hz, 2V peak to peak, lets assume. I want to convert it to digital and make some calculations. For example 0.5-0.3V1.
I was thinking to put an a/d converter, the output of which will be connected to an FPGA. Then,somehow, i have to manipulate the output of the ADC and perform the function easily with some vhdl code (0.5-0.3V1 in our example).
I know that there are other methods to make this adding-subtracting procedure and it can be done even with analog approach only! But i want to use fpga in order to make my pwm pulses for my converter.
So in one point i have my analog signal, on the other point i have the fpga. What do you propose for the in between. If it is so simpe as i think (ADC only) i suppose that the output of the ADC will be an 8bit or 16bit number right? how can i treat this input in vhdl?
In that case, what ADC would you suggest?
FPGA hasn't built-in onboard ADC.
thanks
I was thinking to put an a/d converter, the output of which will be connected to an FPGA. Then,somehow, i have to manipulate the output of the ADC and perform the function easily with some vhdl code (0.5-0.3V1 in our example).
I know that there are other methods to make this adding-subtracting procedure and it can be done even with analog approach only! But i want to use fpga in order to make my pwm pulses for my converter.
So in one point i have my analog signal, on the other point i have the fpga. What do you propose for the in between. If it is so simpe as i think (ADC only) i suppose that the output of the ADC will be an 8bit or 16bit number right? how can i treat this input in vhdl?
In that case, what ADC would you suggest?
FPGA hasn't built-in onboard ADC.
thanks