A 32.768k crystal oscillator used in RTC(real time clock), I use the circuit in the picture. I want to know whether I need to add more inverters as buffer in the RTC system. I'm now using the same inv in the circuit. Both big L(6u) and small w(1u for nmos and 3u for pmos). Is there anything wrong in my circuits?
Hi, schematic is correct. Buffer size depends upon loading but your numbers looks normal.
Please check suggested capacitance value with vendor and notce that R value are generally > 10Mohm.