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Re: bfr96s running hot in RF amplifier

时间:04-05 整理:3721RD 点击:
No.. It's just 0.7 Euro each..
Also for 1uF capacitors, look at here..
http://gr.mouser.com/ProductDetail/M...m6x1U1wfCm4%3d
http://gr.mouser.com/ProductDetail/NXP-Semiconductors/BFQ18A115/?qs=sGAEpiMZZMvDjfggS9kWsYBuK9aEi8UyI62hCrMpwUQ%3d


Thanks! I will try it when the components arrive and let you know. (It might take a few weeks).
I see that there is no base bias resistors, how is the base biased is the input signal is too low?

I have used ideal current source and ideal RF Choke.You should design a current source with 2-3 small signal transistor ( PTAT is preferable PTAT=Proportional To Absolute Temperature)
and Ferrite Beaded RFC. ( for instance from EPCOS ).I have given simplified principal circuit, the rest is on you..

For 100uH coil, this fits your requirements..
http://gr.mouser.com/ProductDetail/E...fO4aSkwpCiQ%3d

I worry about the base choke and rest of the circuit. Shall I connect the current source there?
Can't I just use an ordinary voltage divider to bias the bases?

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