We found this circuit in a 1965 Electronic Design. Transistors are still common but admit equivalents for some of them. The circuit drains a current of only 4 mA.
This VCO works in the opposite way to the previous circuit, converting direct voltages into...
This circuit was found in a European documentation from the 70s. The circuit has a greater gain...
This high-gain digital amplifier uses general-purpose transistors. The supply voltage is logic...