so finally i attach the image in my album
link is
**broken link removed**
so i made changes
plz correct me if i am wrong anywhere
component numbers are differ in this image than urs image.
1 varactor is added in parallel with inductor
2 reverse voltage is applied across varactor and inductor 10 uH
3 10 uH is added so as to block oscillator signals to short into the ground
4 i think 10uH is sufficient to produce large impedence for oscillator signals?
5 as figure shows there is open between L1 and D1 but it not open but ther is a capacitor in between .this capacitor is added to prevent shorting of Q1 collector .am i right in doing all these?
6 let suppose this capacitor is c16 so c16,c1 and c varacotr are inseries and their is equivalent is parallel with L1 and C2
7 so L1,c2,c15,c16 determine the frequency of carrier oscillations and c varactor determines frequency deviation
8 Ceq=c1 series c16 series c varactor
9 c total=Ceq+c2
oscillation f=1/(2 pi sq root(c total*L1))
10 first transistor of ur circuit is not needed at this point so i start the circuit with r1 and c4?
11 i dont know whether c4 is required or not ?
12 rest of the circuit is same
13 in figure ,left topmost wire no included in figure is 5V regulated
14 wire applied across varactor is amplified output from sensor
plz correct me if i am wrong anywher