Question about tank circuits?

Thread Starter

greenelephant150

Joined Apr 18, 2020
9
In reference to the three jpeg files attached, how can 3 tank circuits be modified to allow a lower limit of 100KHz? can the first one with capacitor c20 be modified to allow 100khz by changing c20 to 2500 picofarads? I appreciate everyones feedback?juma--sch-1-136khz-lbp.jpg

juma--sch-1-dds-lbp.jpg

juma--sch-2-lbp.jpg
 

MisterBill2

Joined Jan 23, 2018
18,935
In all LC circuits the tuned frequency is lowered as the values increase. So certainly the frequency can be lowered by increasing the capacitance. But the actual number will require either locating the math or doing experiments. Experimenting may be the simpler approach. But the response curve shape may change a bit.. Increasing the value of C20 a bit will lower the frequency a bit to hit exactly 100KHZ may take a bit of experimenting.
 
Top