This RF preamplifier for the 450 MHz band was found in an amateur radio documentation from the 1980s. The transistor supports an equivalent operating at the recommended frequency.
This circuit was obtained in an American documentation from the 90's. The circuit can be...
Although the integrated used originally is uncommon today, more modern operating equivalents can...
This circuit is designed to measure very weak currents, in the order of picoamperes. We found it...