hi all,
I was reading about crystal oscillators (consisting of invertors and series/parallel resonant quartz) and had these queries in my mind. Hopes u guys can help...
1. What starts the oscillations? What's the very initial input that is fed into the invertor input? An AC or a DC? Will either one work?
2. Assuming we have a uController which utilizes the pierce oscillator mode. When the uController is powered up initial, I guess the very first 'task' is to establish the clock frequency. What is being fed into the invertor input? If AC, what is the frequency of this AC? How does the uController establish this AC's frequency when the crystal oscillator haven't even start oscillating?
Thanks in advance
I was reading about crystal oscillators (consisting of invertors and series/parallel resonant quartz) and had these queries in my mind. Hopes u guys can help...
1. What starts the oscillations? What's the very initial input that is fed into the invertor input? An AC or a DC? Will either one work?
2. Assuming we have a uController which utilizes the pierce oscillator mode. When the uController is powered up initial, I guess the very first 'task' is to establish the clock frequency. What is being fed into the invertor input? If AC, what is the frequency of this AC? How does the uController establish this AC's frequency when the crystal oscillator haven't even start oscillating?
Thanks in advance