Hi,
So, these is (ca.) my oscillator idea, refer pls to page 18:
**broken link removed**
Some important differences:
1,
You NEED another Op type, with high speed capability (have to deliver 10MHz square=must function at 70...100MHz, you can not use the 741 type old one!
Some modern RRIO -or minimum RROutput Type is to elect, with double/bipolar supplying & min. +/_6V capability! Output current capability isnt very interesting here than the "Composite Amp" is a high imp. load (as an OpAmp)...
I would say; order pls such free samples from ADI_AD8675AR (SOIC8) is an excellent amp for these job!
These is a component of $2..3,-:
**broken link removed**
I see yet; AD8021AR can be better =works really up to ca. 100 MHz instead ac 10-20 only, but maximum with +/-12V! Price is similar as the others. In all cases its in your application not a problem!
2,
I would forget Rb & Rc, but on the right side of both diodes use a smaller value (I think so at 1..10K) trimmer between both diodes, the arm of Trimm poti is to connect to the OpAmp output -instead of diodes common as yet...
If you will design with 100pF & 1...20KOhms it should oscillate in your 20x band of 0.5-10MHz
and deliver the wished ca. +/_5V peaks from +/-5-6V supply.
K.
Added after 29 minutes:
Hi Anbu,
I have yet an old, but good description of "Composite Amp", & a version that you should use_in my opinion (from hes "Father: Jim Williams"):
https://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1154,C1009,C1021,P1222,D4116
Refer pls to Fig.12: these is, not more & not less what your output amplifier specification needs_ if you dont believe it; it will be clear some later _
With best wishes!
Karesz