an LCR calculator i have with LTSpice shows the following calculations:
given:
1.67Mhz
60uh
results:
151.375668pf Cx
629.575166 XC
629.575166 XL
for 100khz you want XC and XL in the same neighborhood as the first driver circuit.
given:
100Khz
1mh
results:
2.53303nf Cx
628.318561 XC
628.318561 XL
Cr in the above circuit is not part of a seies resonance wit Lr, but is a load on the crystal. increase it to 27nf to maintain the capacitance ratio with the crystal.
given:
1.67Mhz
60uh
results:
151.375668pf Cx
629.575166 XC
629.575166 XL
for 100khz you want XC and XL in the same neighborhood as the first driver circuit.
given:
100Khz
1mh
results:
2.53303nf Cx
628.318561 XC
628.318561 XL
Cr in the above circuit is not part of a seies resonance wit Lr, but is a load on the crystal. increase it to 27nf to maintain the capacitance ratio with the crystal.
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