bananasiong
New Member
Hi,
Is there any way to add DC offset voltage to the analog signal?
Since audio signal goes +ve and -ve, if I use a PIC to do sampling, the -ve cycle will be read as 0. I just found that the reference voltage low (VrefL) for some PIC is 2 V minimum, and Vss-0.3 V for some PIC. That is not enough for the audio signal, let's say it swings from 1 V to -1 V.
Is there any solution besides using external A/D device that allow -ve cycle?
Thanks
Is there any way to add DC offset voltage to the analog signal?
Since audio signal goes +ve and -ve, if I use a PIC to do sampling, the -ve cycle will be read as 0. I just found that the reference voltage low (VrefL) for some PIC is 2 V minimum, and Vss-0.3 V for some PIC. That is not enough for the audio signal, let's say it swings from 1 V to -1 V.
Is there any solution besides using external A/D device that allow -ve cycle?
Thanks