This power step drains just 3.5 mA from the battery and can provide good playback on a 4-ohm speaker. The circuit is from an 80's documentation.
This differential amplifier, found in a 1964 Electronic Design, has a gain of 30. The setting can be...
The simple transistor test shown in the figure can be powered by a 9V battery. The test is for...
This circuit was found in a 1969 Motorola documentation. The FET admits an equivalent. The circuit...