| Crystal
Oscillators |
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| • | Impedance varies
with |
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| frequency |
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| • | Square wave
crystal |
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| oscillator
circuit |
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| • | Choose C1
and C2 |
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| – | Oscillation
frequency |
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| between fs
and fp |
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| R2 |
| vout |
| CMOS Inverter |
| R1 |
| XTAL |
| C1 |
| C2 |
