This broadband amplifier was found in an Elektor from the 90's. The gain is 10 dB with a noise figure of less than 5 dB.
This circuit can be used for several purposes such as pulse counter, pass counter, roulette, etc....
This circuit is from Radio Electronics. The magazine no more exists, but the circuit can be...
We found this circuit in a French documentation from the 80's. The components used are still...