Found in a 1948 MIT documentation, this circuit uses a 0 to 100 uA microammeter as an indicator. The power supply is 150 V.
This circuit was found in an American documentation from the 70s, but it can be implemented with a...
This integrated contains a Class B circuit originally developed to provide 6 W in a car radio...
This differential amplifier, found in a 1964 Electronic Design, has a gain of 30. The setting can be...