Negative feedback wide band amplifier
The original circuit is published in トロイダルコア活用百科(H. Yamamura). Input and output impedance can be matched and it is very stable thanks to negative feedback. You can use it as a gain block for RX, a low power (< ~10dBm) block for TX and etc.. Please use transisters with f << transition frequency fT.Please input gain G0 and impedance Z0.
Please change VCC, R1, R2 and RE. I used typical parameters of the 2N3904, but other devices can be used (there may be a little error).
