With this circuit it is possible to modulate pulses from a pulsating input signal. The PNP transistor can be the BC558 and the power must be supplied with 5 V.
This amplifier, common in 1986, uses a hybrid integrated circuit that can offer some difficulty to obtain...
Operational amplifiers with field effect transistors at the input are ideal for applications where...
In the figure we have the configuration of a voltage regulator with 3 transistors. The components depend...