What is the role of 0ohms in demo CR95HF reader (application note AN3394). Demo gerbers call these 0 ohm shorts not Resistor but "L01" and "L02". Are they neccessary?
On the picture of the PCB (page 6/29 of the same AN3394 Doc ID 018754 Rev 5) R12 is not seated. Is it neccessary?
On the same figure (page 6/29 AN3394) C17 seems to be NOT parallel to C3, but R1-C17-R5 circuit is "above" C3 track. In theory 229pF is needed where parallel 200pF+15pF is used. Do I need to "finetune" capacitance this way if 220pF is only +/-10%. Is this so sensitive?