Hello,
I am trying to generate a square wave ate 13.56MHz using the SN74LVC1GX04DRLR oscillator driver.
1) First a calculate the values of the caps. According to the datasheet :
CL = (C1*C2) / (C1+C2) and C1 = C2. My oscillator has CL = 18pF. Therefore, I have C1 = C2 = 36pF.
2) Then, I calculate the value of Rs. Again, according to the datasheet :
Rs = Xc2 = 1/ (13.56MHz * 36pF * 2 * pi) = 326ohm.
3) Finally, I chose for Rf the same value as in the datasheet : 12Momh.
I made a PCB, with ground plane under the oscillator and soldered everything (and double checked).
It seems like the oscillaiton does not start.
Any idea?
thanks,