Other amplifiers of the series like the MC3301, MC3401 and LM2900 can be used in this circuit. We found this setting on Motorola's Linear Interface ICs. The circuit uses a magnetic sensor.
This circuit shows on the screen of an oscilloscope two signals alternately at a frequency that depends...
This circuit is from a Radio Electronics from August 1992. The transistor used allows the control of...
This circuit measures the strength of audio signals. We found it in an American publication from...