This selectivity multiplier circuit for 455 kHz IF receivers was found in American documentation from the 1980s. The circuit requires a symmetrical power supply.
In the figure we have a current source whose intensity is given by the formula next to the...
This circuit amplifies signals from 0.5 Hz to 300 kHz. We found it in an old documentation. Equivalent...
The circuit we show is a water pump actuator that, in addition to being automatic, has a water...